20665240

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{13963}}^1$

素因数の和:14011

約数の個数: 32

約数和(自身を含む): 47756880

約数和(自身を除く): 27091640

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 13963, 27926, 55852, 69815, 111704, 139630, 279260, 516631, 558520, 1033262, 2066524, 2583155, 4133048, 5166310, 10332620, 20665240]

約数ペア:

[(1, 20665240), (2, 10332620), (4, 5166310), (5, 4133048), (8, 2583155), (10, 2066524), (20, 1033262), (37, 558520), (40, 516631), (74, 279260), (148, 139630), (185, 111704), (296, 69815), (370, 55852), (740, 27926), (1480, 13963)]