28970840

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{101}}^2$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 66763440

約数和(自身を除く): 37792600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 101, 142, 202, 284, 355, 404, 505, 568, 710, 808, 1010, 1420, 2020, 2840, 4040, 7171, 10201, 14342, 20402, 28684, 35855, 40804, 51005, 57368, 71710, 81608, 102010, 143420, 204020, 286840, 408040, 724271, 1448542, 2897084, 3621355, 5794168, 7242710, 14485420, 28970840]

約数ペア:

[(1, 28970840), (2, 14485420), (4, 7242710), (5, 5794168), (8, 3621355), (10, 2897084), (20, 1448542), (40, 724271), (71, 408040), (101, 286840), (142, 204020), (202, 143420), (284, 102010), (355, 81608), (404, 71710), (505, 57368), (568, 51005), (710, 40804), (808, 35855), (1010, 28684), (1420, 20402), (2020, 14342), (2840, 10201), (4040, 7171)]