21904490

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1\times {\mathrm{241}}^1$

素因数の和:458

約数の個数: 32

約数和(自身を含む): 40510800

約数和(自身を除く): 18606310

約数列:

[1, 2, 5, 10, 61, 122, 149, 241, 298, 305, 482, 610, 745, 1205, 1490, 2410, 9089, 14701, 18178, 29402, 35909, 45445, 71818, 73505, 90890, 147010, 179545, 359090, 2190449, 4380898, 10952245, 21904490]

約数ペア:

[(1, 21904490), (2, 10952245), (5, 4380898), (10, 2190449), (61, 359090), (122, 179545), (149, 147010), (241, 90890), (298, 73505), (305, 71818), (482, 45445), (610, 35909), (745, 29402), (1205, 18178), (1490, 14701), (2410, 9089)]