261386580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{977}}^1$

素因数の和:1023

約数の個数: 192

約数和(自身を含む): 920102400

約数和(自身を除く): 658715820

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 49, 52, 60, 65, 70, 78, 84, 91, 98, 105, 130, 140, 147, 156, 182, 195, 196, 210, 245, 260, 273, 294, 343, 364, 390, 420, 455, 490, 546, 588, 637, 686, 735, 780, 910, 977, 980, 1029, 1092, 1274, 1365, 1372, 1470, 1715, 1820, 1911, 1954, 2058, 2548, 2730, 2931, 2940, 3185, 3430, 3822, 3908, 4116, 4459, 4885, 5145, 5460, 5862, 6370, 6839, 6860, 7644, 8918, 9555, 9770, 10290, 11724, 12701, 12740, 13377, 13678, 14655, 17836, 19110, 19540, 20517, 20580, 22295, 25402, 26754, 27356, 29310, 34195, 38103, 38220, 41034, 44590, 47873, 50804, 53508, 58620, 63505, 66885, 68390, 76206, 82068, 88907, 89180, 95746, 102585, 127010, 133770, 136780, 143619, 152412, 177814, 190515, 191492, 205170, 239365, 254020, 266721, 267540, 287238, 335111, 355628, 381030, 410340, 444535, 478730, 533442, 574476, 622349, 670222, 718095, 762060, 889070, 957460, 1005333, 1066884, 1244698, 1333605, 1340444, 1436190, 1675555, 1778140, 1867047, 2010666, 2489396, 2667210, 2872380, 3111745, 3351110, 3734094, 4021332, 4356443, 5026665, 5334420, 6223490, 6702220, 7468188, 8712886, 9335235, 10053330, 12446980, 13069329, 17425772, 18670470, 20106660, 21782215, 26138658, 37340940, 43564430, 52277316, 65346645, 87128860, 130693290, 261386580]

約数ペア:

[(1, 261386580), (2, 130693290), (3, 87128860), (4, 65346645), (5, 52277316), (6, 43564430), (7, 37340940), (10, 26138658), (12, 21782215), (13, 20106660), (14, 18670470), (15, 17425772), (20, 13069329), (21, 12446980), (26, 10053330), (28, 9335235), (30, 8712886), (35, 7468188), (39, 6702220), (42, 6223490), (49, 5334420), (52, 5026665), (60, 4356443), (65, 4021332), (70, 3734094), (78, 3351110), (84, 3111745), (91, 2872380), (98, 2667210), (105, 2489396), (130, 2010666), (140, 1867047), (147, 1778140), (156, 1675555), (182, 1436190), (195, 1340444), (196, 1333605), (210, 1244698), (245, 1066884), (260, 1005333), (273, 957460), (294, 889070), (343, 762060), (364, 718095), (390, 670222), (420, 622349), (455, 574476), (490, 533442), (546, 478730), (588, 444535), (637, 410340), (686, 381030), (735, 355628), (780, 335111), (910, 287238), (977, 267540), (980, 266721), (1029, 254020), (1092, 239365), (1274, 205170), (1365, 191492), (1372, 190515), (1470, 177814), (1715, 152412), (1820, 143619), (1911, 136780), (1954, 133770), (2058, 127010), (2548, 102585), (2730, 95746), (2931, 89180), (2940, 88907), (3185, 82068), (3430, 76206), (3822, 68390), (3908, 66885), (4116, 63505), (4459, 58620), (4885, 53508), (5145, 50804), (5460, 47873), (5862, 44590), (6370, 41034), (6839, 38220), (6860, 38103), (7644, 34195), (8918, 29310), (9555, 27356), (9770, 26754), (10290, 25402), (11724, 22295), (12701, 20580), (12740, 20517), (13377, 19540), (13678, 19110), (14655, 17836)]