21457430

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{359}}^1$

素因数の和:548

約数の個数: 32

約数和(自身を含む): 39916800

約数和(自身を除く): 18459370

約数列:

[1, 2, 5, 10, 43, 86, 139, 215, 278, 359, 430, 695, 718, 1390, 1795, 3590, 5977, 11954, 15437, 29885, 30874, 49901, 59770, 77185, 99802, 154370, 249505, 499010, 2145743, 4291486, 10728715, 21457430]

約数ペア:

[(1, 21457430), (2, 10728715), (5, 4291486), (10, 2145743), (43, 499010), (86, 249505), (139, 154370), (215, 99802), (278, 77185), (359, 59770), (430, 49901), (695, 30874), (718, 29885), (1390, 15437), (1795, 11954), (3590, 5977)]