21068788

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{4177}}^1$

素因数の和:4291

約数の個数: 24

約数和(自身を含む): 40125512

約数和(自身を除く): 19056724

約数列:

[1, 2, 4, 13, 26, 52, 97, 194, 388, 1261, 2522, 4177, 5044, 8354, 16708, 54301, 108602, 217204, 405169, 810338, 1620676, 5267197, 10534394, 21068788]

約数ペア:

[(1, 21068788), (2, 10534394), (4, 5267197), (13, 1620676), (26, 810338), (52, 405169), (97, 217204), (194, 108602), (388, 54301), (1261, 16708), (2522, 8354), (4177, 5044)]