21360020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{1229}}^1$

素因数の和:1328

約数の個数: 48

約数和(自身を含む): 49593600

約数和(自身を除く): 28233580

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 79, 110, 158, 220, 316, 395, 790, 869, 1229, 1580, 1738, 2458, 3476, 4345, 4916, 6145, 8690, 12290, 13519, 17380, 24580, 27038, 54076, 67595, 97091, 135190, 194182, 270380, 388364, 485455, 970910, 1068001, 1941820, 2136002, 4272004, 5340005, 10680010, 21360020]

約数ペア:

[(1, 21360020), (2, 10680010), (4, 5340005), (5, 4272004), (10, 2136002), (11, 1941820), (20, 1068001), (22, 970910), (44, 485455), (55, 388364), (79, 270380), (110, 194182), (158, 135190), (220, 97091), (316, 67595), (395, 54076), (790, 27038), (869, 24580), (1229, 17380), (1580, 13519), (1738, 12290), (2458, 8690), (3476, 6145), (4345, 4916)]