1640464520

素因数分解:

$2^3\times 5^1\times {\mathrm{103}}^1\times {\mathrm{398171}}^1$

素因数の和:398285

約数の個数: 32

約数和(自身を含む): 3726889920

約数和(自身を除く): 2086425400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 103, 206, 412, 515, 824, 1030, 2060, 4120, 398171, 796342, 1592684, 1990855, 3185368, 3981710, 7963420, 15926840, 41011613, 82023226, 164046452, 205058065, 328092904, 410116130, 820232260, 1640464520]

約数ペア:

[(1, 1640464520), (2, 820232260), (4, 410116130), (5, 328092904), (8, 205058065), (10, 164046452), (20, 82023226), (40, 41011613), (103, 15926840), (206, 7963420), (412, 3981710), (515, 3185368), (824, 1990855), (1030, 1592684), (2060, 796342), (4120, 398171)]