21495640

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{2141}}^1$

素因数の和:2403

約数の個数: 32

約数和(自身を含む): 48580560

約数和(自身を除く): 27084920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2008, 2141, 2510, 4282, 5020, 8564, 10040, 10705, 17128, 21410, 42820, 85640, 537391, 1074782, 2149564, 2686955, 4299128, 5373910, 10747820, 21495640]

約数ペア:

[(1, 21495640), (2, 10747820), (4, 5373910), (5, 4299128), (8, 2686955), (10, 2149564), (20, 1074782), (40, 537391), (251, 85640), (502, 42820), (1004, 21410), (1255, 17128), (2008, 10705), (2141, 10040), (2510, 8564), (4282, 5020)]