64817125

素因数分解:

$5^3\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{389}}^1$

素因数の和:478

約数の個数: 32

約数和(自身を含む): 85662720

約数和(自身を除く): 20845595

約数列:

[1, 5, 25, 31, 43, 125, 155, 215, 389, 775, 1075, 1333, 1945, 3875, 5375, 6665, 9725, 12059, 16727, 33325, 48625, 60295, 83635, 166625, 301475, 418175, 518537, 1507375, 2090875, 2592685, 12963425, 64817125]

約数ペア:

[(1, 64817125), (5, 12963425), (25, 2592685), (31, 2090875), (43, 1507375), (125, 518537), (155, 418175), (215, 301475), (389, 166625), (775, 83635), (1075, 60295), (1333, 48625), (1945, 33325), (3875, 16727), (5375, 12059), (6665, 9725)]