21171020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{761}}^1$

素因数の和:890

約数の個数: 48

約数和(自身を含む): 48390048

約数和(自身を除く): 27219028

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 107, 130, 214, 260, 428, 535, 761, 1070, 1391, 1522, 2140, 2782, 3044, 3805, 5564, 6955, 7610, 9893, 13910, 15220, 19786, 27820, 39572, 49465, 81427, 98930, 162854, 197860, 325708, 407135, 814270, 1058551, 1628540, 2117102, 4234204, 5292755, 10585510, 21171020]

約数ペア:

[(1, 21171020), (2, 10585510), (4, 5292755), (5, 4234204), (10, 2117102), (13, 1628540), (20, 1058551), (26, 814270), (52, 407135), (65, 325708), (107, 197860), (130, 162854), (214, 98930), (260, 81427), (428, 49465), (535, 39572), (761, 27820), (1070, 19786), (1391, 15220), (1522, 13910), (2140, 9893), (2782, 7610), (3044, 6955), (3805, 5564)]