1256408920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{1901}}^1$

素因数の和:1997

約数の個数: 128

約数和(自身を含む): 3220922880

約数和(自身を除く): 1964513960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 41, 52, 62, 65, 82, 104, 124, 130, 155, 164, 205, 248, 260, 310, 328, 403, 410, 520, 533, 620, 806, 820, 1066, 1240, 1271, 1612, 1640, 1901, 2015, 2132, 2542, 2665, 3224, 3802, 4030, 4264, 5084, 5330, 6355, 7604, 8060, 9505, 10168, 10660, 12710, 15208, 16120, 16523, 19010, 21320, 24713, 25420, 33046, 38020, 49426, 50840, 58931, 66092, 76040, 77941, 82615, 98852, 117862, 123565, 132184, 155882, 165230, 197704, 235724, 247130, 294655, 311764, 330460, 389705, 471448, 494260, 589310, 623528, 660920, 766103, 779410, 988520, 1013233, 1178620, 1532206, 1558820, 2026466, 2357240, 2416171, 3064412, 3117640, 3830515, 4052932, 4832342, 5066165, 6128824, 7661030, 8105864, 9664684, 10132330, 12080855, 15322060, 19329368, 20264660, 24161710, 30644120, 31410223, 40529320, 48323420, 62820446, 96646840, 125640892, 157051115, 251281784, 314102230, 628204460, 1256408920]

約数ペア:

[(1, 1256408920), (2, 628204460), (4, 314102230), (5, 251281784), (8, 157051115), (10, 125640892), (13, 96646840), (20, 62820446), (26, 48323420), (31, 40529320), (40, 31410223), (41, 30644120), (52, 24161710), (62, 20264660), (65, 19329368), (82, 15322060), (104, 12080855), (124, 10132330), (130, 9664684), (155, 8105864), (164, 7661030), (205, 6128824), (248, 5066165), (260, 4832342), (310, 4052932), (328, 3830515), (403, 3117640), (410, 3064412), (520, 2416171), (533, 2357240), (620, 2026466), (806, 1558820), (820, 1532206), (1066, 1178620), (1240, 1013233), (1271, 988520), (1612, 779410), (1640, 766103), (1901, 660920), (2015, 623528), (2132, 589310), (2542, 494260), (2665, 471448), (3224, 389705), (3802, 330460), (4030, 311764), (4264, 294655), (5084, 247130), (5330, 235724), (6355, 197704), (7604, 165230), (8060, 155882), (9505, 132184), (10168, 123565), (10660, 117862), (12710, 98852), (15208, 82615), (16120, 77941), (16523, 76040), (19010, 66092), (21320, 58931), (24713, 50840), (25420, 49426), (33046, 38020)]