21087560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{379}}^1$

素因数の和:510

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 30622840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 107, 130, 214, 260, 379, 428, 520, 535, 758, 856, 1070, 1391, 1516, 1895, 2140, 2782, 3032, 3790, 4280, 4927, 5564, 6955, 7580, 9854, 11128, 13910, 15160, 19708, 24635, 27820, 39416, 40553, 49270, 55640, 81106, 98540, 162212, 197080, 202765, 324424, 405530, 527189, 811060, 1054378, 1622120, 2108756, 2635945, 4217512, 5271890, 10543780, 21087560]

約数ペア:

[(1, 21087560), (2, 10543780), (4, 5271890), (5, 4217512), (8, 2635945), (10, 2108756), (13, 1622120), (20, 1054378), (26, 811060), (40, 527189), (52, 405530), (65, 324424), (104, 202765), (107, 197080), (130, 162212), (214, 98540), (260, 81106), (379, 55640), (428, 49270), (520, 40553), (535, 39416), (758, 27820), (856, 24635), (1070, 19708), (1391, 15160), (1516, 13910), (1895, 11128), (2140, 9854), (2782, 7580), (3032, 6955), (3790, 5564), (4280, 4927)]