18085520

素因数分解:

$2^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{1249}}^1$

素因数の和:1443

約数の個数: 40

約数和(自身を含む): 42315000

約数和(自身を除く): 24229480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 181, 362, 724, 905, 1249, 1448, 1810, 2498, 2896, 3620, 4996, 6245, 7240, 9992, 12490, 14480, 19984, 24980, 49960, 99920, 226069, 452138, 904276, 1130345, 1808552, 2260690, 3617104, 4521380, 9042760, 18085520]

約数ペア:

[(1, 18085520), (2, 9042760), (4, 4521380), (5, 3617104), (8, 2260690), (10, 1808552), (16, 1130345), (20, 904276), (40, 452138), (80, 226069), (181, 99920), (362, 49960), (724, 24980), (905, 19984), (1249, 14480), (1448, 12490), (1810, 9992), (2498, 7240), (2896, 6245), (3620, 4996)]