256880453780

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{659}}^1\times {\mathrm{319511}}^1$

素因数の和:320240

約数の個数: 48

約数和(自身を含む): 549126103680

約数和(自身を除く): 292245649900

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 659, 1220, 1318, 2636, 3295, 6590, 13180, 40199, 80398, 160796, 200995, 319511, 401990, 639022, 803980, 1278044, 1597555, 3195110, 6390220, 19490171, 38980342, 77960684, 97450855, 194901710, 210557749, 389803420, 421115498, 842230996, 1052788745, 2105577490, 4211154980, 12844022689, 25688045378, 51376090756, 64220113445, 128440226890, 256880453780]

約数ペア:

[(1, 256880453780), (2, 128440226890), (4, 64220113445), (5, 51376090756), (10, 25688045378), (20, 12844022689), (61, 4211154980), (122, 2105577490), (244, 1052788745), (305, 842230996), (610, 421115498), (659, 389803420), (1220, 210557749), (1318, 194901710), (2636, 97450855), (3295, 77960684), (6590, 38980342), (13180, 19490171), (40199, 6390220), (80398, 3195110), (160796, 1597555), (200995, 1278044), (319511, 803980), (401990, 639022)]