19453980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{509}}^1$

素因数の和:548

約数の個数: 144

約数和(自身を含む): 68372640

約数和(自身を除く): 48918660

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, 364, 390, 420, 455, 490, 509, 546, 588, 637, 735, 780, 910, 980, 1018, 1092, 1274, 1365, 1470, 1527, 1820, 1911, 2036, 2545, 2548, 2730, 2940, 3054, 3185, 3563, 3822, 5090, 5460, 6108, 6370, 6617, 7126, 7635, 7644, 9555, 10180, 10689, 12740, 13234, 14252, 15270, 17815, 19110, 19851, 21378, 24941, 26468, 30540, 33085, 35630, 38220, 39702, 42756, 46319, 49882, 53445, 66170, 71260, 74823, 79404, 92638, 99255, 99764, 106890, 124705, 132340, 138957, 149646, 185276, 198510, 213780, 231595, 249410, 277914, 299292, 324233, 374115, 397020, 463190, 498820, 555828, 648466, 694785, 748230, 926380, 972699, 1296932, 1389570, 1496460, 1621165, 1945398, 2779140, 3242330, 3890796, 4863495, 6484660, 9726990, 19453980]

約数ペア:

[(1, 19453980), (2, 9726990), (3, 6484660), (4, 4863495), (5, 3890796), (6, 3242330), (7, 2779140), (10, 1945398), (12, 1621165), (13, 1496460), (14, 1389570), (15, 1296932), (20, 972699), (21, 926380), (26, 748230), (28, 694785), (30, 648466), (35, 555828), (39, 498820), (42, 463190), (49, 397020), (52, 374115), (60, 324233), (65, 299292), (70, 277914), (78, 249410), (84, 231595), (91, 213780), (98, 198510), (105, 185276), (130, 149646), (140, 138957), (147, 132340), (156, 124705), (182, 106890), (195, 99764), (196, 99255), (210, 92638), (245, 79404), (260, 74823), (273, 71260), (294, 66170), (364, 53445), (390, 49882), (420, 46319), (455, 42756), (490, 39702), (509, 38220), (546, 35630), (588, 33085), (637, 30540), (735, 26468), (780, 24941), (910, 21378), (980, 19851), (1018, 19110), (1092, 17815), (1274, 15270), (1365, 14252), (1470, 13234), (1527, 12740), (1820, 10689), (1911, 10180), (2036, 9555), (2545, 7644), (2548, 7635), (2730, 7126), (2940, 6617), (3054, 6370), (3185, 6108), (3563, 5460), (3822, 5090)]