21477560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{401}}^1$

素因数の和:528

約数の個数: 64

約数和(自身を含む): 52678080

約数和(自身を除く): 31200520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 103, 104, 130, 206, 260, 401, 412, 515, 520, 802, 824, 1030, 1339, 1604, 2005, 2060, 2678, 3208, 4010, 4120, 5213, 5356, 6695, 8020, 10426, 10712, 13390, 16040, 20852, 26065, 26780, 41303, 41704, 52130, 53560, 82606, 104260, 165212, 206515, 208520, 330424, 413030, 536939, 826060, 1073878, 1652120, 2147756, 2684695, 4295512, 5369390, 10738780, 21477560]

約数ペア:

[(1, 21477560), (2, 10738780), (4, 5369390), (5, 4295512), (8, 2684695), (10, 2147756), (13, 1652120), (20, 1073878), (26, 826060), (40, 536939), (52, 413030), (65, 330424), (103, 208520), (104, 206515), (130, 165212), (206, 104260), (260, 82606), (401, 53560), (412, 52130), (515, 41704), (520, 41303), (802, 26780), (824, 26065), (1030, 20852), (1339, 16040), (1604, 13390), (2005, 10712), (2060, 10426), (2678, 8020), (3208, 6695), (4010, 5356), (4120, 5213)]