21904218

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{263}}^1\times {\mathrm{661}}^1$

素因数の和:939

約数の個数: 48

約数和(自身を含む): 54527616

約数和(自身を除く): 32623398

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 263, 526, 661, 789, 1322, 1578, 1841, 1983, 2367, 3682, 3966, 4627, 4734, 5523, 5949, 9254, 11046, 11898, 13881, 16569, 27762, 33138, 41643, 83286, 173843, 347686, 521529, 1043058, 1216901, 1564587, 2433802, 3129174, 3650703, 7301406, 10952109, 21904218]

約数ペア:

[(1, 21904218), (2, 10952109), (3, 7301406), (6, 3650703), (7, 3129174), (9, 2433802), (14, 1564587), (18, 1216901), (21, 1043058), (42, 521529), (63, 347686), (126, 173843), (263, 83286), (526, 41643), (661, 33138), (789, 27762), (1322, 16569), (1578, 13881), (1841, 11898), (1983, 11046), (2367, 9254), (3682, 5949), (3966, 5523), (4627, 4734)]