21657272

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{419}}^1$

素因数の和:516

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 29145928

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 71, 91, 104, 142, 182, 284, 364, 419, 497, 568, 728, 838, 923, 994, 1676, 1846, 1988, 2933, 3352, 3692, 3976, 5447, 5866, 6461, 7384, 10894, 11732, 12922, 21788, 23464, 25844, 29749, 38129, 43576, 51688, 59498, 76258, 118996, 152516, 208243, 237992, 305032, 386737, 416486, 773474, 832972, 1546948, 1665944, 2707159, 3093896, 5414318, 10828636, 21657272]

約数ペア:

[(1, 21657272), (2, 10828636), (4, 5414318), (7, 3093896), (8, 2707159), (13, 1665944), (14, 1546948), (26, 832972), (28, 773474), (52, 416486), (56, 386737), (71, 305032), (91, 237992), (104, 208243), (142, 152516), (182, 118996), (284, 76258), (364, 59498), (419, 51688), (497, 43576), (568, 38129), (728, 29749), (838, 25844), (923, 23464), (994, 21788), (1676, 12922), (1846, 11732), (1988, 10894), (2933, 7384), (3352, 6461), (3692, 5866), (3976, 5447)]