21131865

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{16193}}^1$

素因数の和:16233

約数の個数: 24

約数和(自身を含む): 37893960

約数和(自身を除く): 16762095

約数列:

[1, 3, 5, 9, 15, 29, 45, 87, 145, 261, 435, 1305, 16193, 48579, 80965, 145737, 242895, 469597, 728685, 1408791, 2347985, 4226373, 7043955, 21131865]

約数ペア:

[(1, 21131865), (3, 7043955), (5, 4226373), (9, 2347985), (15, 1408791), (29, 728685), (45, 469597), (87, 242895), (145, 145737), (261, 80965), (435, 48579), (1305, 16193)]