21591908

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{419}}^1\times {\mathrm{991}}^1$

素因数の和:1427

約数の個数: 24

約数和(自身を含む): 40830720

約数和(自身を除く): 19238812

約数列:

[1, 2, 4, 13, 26, 52, 419, 838, 991, 1676, 1982, 3964, 5447, 10894, 12883, 21788, 25766, 51532, 415229, 830458, 1660916, 5397977, 10795954, 21591908]

約数ペア:

[(1, 21591908), (2, 10795954), (4, 5397977), (13, 1660916), (26, 830458), (52, 415229), (419, 51532), (838, 25766), (991, 21788), (1676, 12883), (1982, 10894), (3964, 5447)]