21045908

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{163}}^1\times {\mathrm{191}}^1$

素因数の和:384

約数の個数: 36

約数和(自身を含む): 40336128

約数和(自身を除く): 19290220

約数列:

[1, 2, 4, 13, 26, 52, 163, 169, 191, 326, 338, 382, 652, 676, 764, 2119, 2483, 4238, 4966, 8476, 9932, 27547, 31133, 32279, 55094, 62266, 64558, 110188, 124532, 129116, 404729, 809458, 1618916, 5261477, 10522954, 21045908]

約数ペア:

[(1, 21045908), (2, 10522954), (4, 5261477), (13, 1618916), (26, 809458), (52, 404729), (163, 129116), (169, 124532), (191, 110188), (326, 64558), (338, 62266), (382, 55094), (652, 32279), (676, 31133), (764, 27547), (2119, 9932), (2483, 8476), (4238, 4966)]