21290828

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{4933}}^1$

素因数の和:5033

約数の個数: 24

約数和(自身を含む): 40616688

約数和(自身を除く): 19325860

約数列:

[1, 2, 4, 13, 26, 52, 83, 166, 332, 1079, 2158, 4316, 4933, 9866, 19732, 64129, 128258, 256516, 409439, 818878, 1637756, 5322707, 10645414, 21290828]

約数ペア:

[(1, 21290828), (2, 10645414), (4, 5322707), (13, 1637756), (26, 818878), (52, 409439), (83, 256516), (166, 128258), (332, 64129), (1079, 19732), (2158, 9866), (4316, 4933)]