2220520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{1291}}^1$

素因数の和:1345

約数の個数: 32

約数和(自身を含む): 5116320

約数和(自身を除く): 2895800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1291, 1720, 2582, 5164, 6455, 10328, 12910, 25820, 51640, 55513, 111026, 222052, 277565, 444104, 555130, 1110260, 2220520]

約数ペア:

[(1, 2220520), (2, 1110260), (4, 555130), (5, 444104), (8, 277565), (10, 222052), (20, 111026), (40, 55513), (43, 51640), (86, 25820), (172, 12910), (215, 10328), (344, 6455), (430, 5164), (860, 2582), (1291, 1720)]