18029720

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{701}}^1$

素因数の和:1355

約数の個数: 32

約数和(自身を含む): 40687920

約数和(自身を除く): 22658200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 701, 1286, 1402, 2572, 2804, 3215, 3505, 5144, 5608, 6430, 7010, 12860, 14020, 25720, 28040, 450743, 901486, 1802972, 2253715, 3605944, 4507430, 9014860, 18029720]

約数ペア:

[(1, 18029720), (2, 9014860), (4, 4507430), (5, 3605944), (8, 2253715), (10, 1802972), (20, 901486), (40, 450743), (643, 28040), (701, 25720), (1286, 14020), (1402, 12860), (2572, 7010), (2804, 6430), (3215, 5608), (3505, 5144)]