21137870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{277}}^1\times {\mathrm{587}}^1$

素因数の和:884

約数の個数: 32

約数和(自身を含む): 41192928

約数和(自身を除く): 20055058

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 277, 554, 587, 1174, 1385, 2770, 2935, 3601, 5870, 7202, 7631, 15262, 18005, 36010, 38155, 76310, 162599, 325198, 812995, 1625990, 2113787, 4227574, 10568935, 21137870]

約数ペア:

[(1, 21137870), (2, 10568935), (5, 4227574), (10, 2113787), (13, 1625990), (26, 812995), (65, 325198), (130, 162599), (277, 76310), (554, 38155), (587, 36010), (1174, 18005), (1385, 15262), (2770, 7631), (2935, 7202), (3601, 5870)]