287778520

素因数分解:

$2^3\times 5^1\times {\mathrm{2213}}^1\times {\mathrm{3251}}^1$

素因数の和:5475

約数の個数: 32

約数和(自身を含む): 647993520

約数和(自身を除く): 360215000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2213, 3251, 4426, 6502, 8852, 11065, 13004, 16255, 17704, 22130, 26008, 32510, 44260, 65020, 88520, 130040, 7194463, 14388926, 28777852, 35972315, 57555704, 71944630, 143889260, 287778520]

約数ペア:

[(1, 287778520), (2, 143889260), (4, 71944630), (5, 57555704), (8, 35972315), (10, 28777852), (20, 14388926), (40, 7194463), (2213, 130040), (3251, 88520), (4426, 65020), (6502, 44260), (8852, 32510), (11065, 26008), (13004, 22130), (16255, 17704)]