18687560

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1201}}^1$

素因数の和:1601

約数の個数: 32

約数和(自身を含む): 42190200

約数和(自身を除く): 23502640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1201, 1556, 1945, 2402, 3112, 3890, 4804, 6005, 7780, 9608, 12010, 15560, 24020, 48040, 467189, 934378, 1868756, 2335945, 3737512, 4671890, 9343780, 18687560]

約数ペア:

[(1, 18687560), (2, 9343780), (4, 4671890), (5, 3737512), (8, 2335945), (10, 1868756), (20, 934378), (40, 467189), (389, 48040), (778, 24020), (1201, 15560), (1556, 12010), (1945, 9608), (2402, 7780), (3112, 6005), (3890, 4804)]