21251895

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{6529}}^1$

素因数の和:6575

約数の個数: 32

約数和(自身を含む): 40120320

約数和(自身を除く): 18868425

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 93, 105, 155, 217, 465, 651, 1085, 3255, 6529, 19587, 32645, 45703, 97935, 137109, 202399, 228515, 607197, 685545, 1011995, 1416793, 3035985, 4250379, 7083965, 21251895]

約数ペア:

[(1, 21251895), (3, 7083965), (5, 4250379), (7, 3035985), (15, 1416793), (21, 1011995), (31, 685545), (35, 607197), (93, 228515), (105, 202399), (155, 137109), (217, 97935), (465, 45703), (651, 32645), (1085, 19587), (3255, 6529)]