405208040

素因数分解:

$2^3\times 5^1\times {\mathrm{811}}^1\times {\mathrm{12491}}^1$

素因数の和:13313

約数の個数: 32

約数和(自身を含む): 912915360

約数和(自身を除く): 507707320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 811, 1622, 3244, 4055, 6488, 8110, 12491, 16220, 24982, 32440, 49964, 62455, 99928, 124910, 249820, 499640, 10130201, 20260402, 40520804, 50651005, 81041608, 101302010, 202604020, 405208040]

約数ペア:

[(1, 405208040), (2, 202604020), (4, 101302010), (5, 81041608), (8, 50651005), (10, 40520804), (20, 20260402), (40, 10130201), (811, 499640), (1622, 249820), (3244, 124910), (4055, 99928), (6488, 62455), (8110, 49964), (12491, 32440), (16220, 24982)]