18311120

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5323}}^1$

素因数の和:5379

約数の個数: 40

約数和(自身を含む): 43571616

約数和(自身を除く): 25260496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5323, 10646, 21292, 26615, 42584, 53230, 85168, 106460, 212920, 228889, 425840, 457778, 915556, 1144445, 1831112, 2288890, 3662224, 4577780, 9155560, 18311120]

約数ペア:

[(1, 18311120), (2, 9155560), (4, 4577780), (5, 3662224), (8, 2288890), (10, 1831112), (16, 1144445), (20, 915556), (40, 457778), (43, 425840), (80, 228889), (86, 212920), (172, 106460), (215, 85168), (344, 53230), (430, 42584), (688, 26615), (860, 21292), (1720, 10646), (3440, 5323)]