18791420

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{179}}^1\times {\mathrm{181}}^1$

素因数の和:398

約数の個数: 48

約数和(自身を含む): 41277600

約数和(自身を除く): 22486180

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 179, 181, 290, 358, 362, 580, 716, 724, 895, 905, 1790, 1810, 3580, 3620, 5191, 5249, 10382, 10498, 20764, 20996, 25955, 26245, 32399, 51910, 52490, 64798, 103820, 104980, 129596, 161995, 323990, 647980, 939571, 1879142, 3758284, 4697855, 9395710, 18791420]

約数ペア:

[(1, 18791420), (2, 9395710), (4, 4697855), (5, 3758284), (10, 1879142), (20, 939571), (29, 647980), (58, 323990), (116, 161995), (145, 129596), (179, 104980), (181, 103820), (290, 64798), (358, 52490), (362, 51910), (580, 32399), (716, 26245), (724, 25955), (895, 20996), (905, 20764), (1790, 10498), (1810, 10382), (3580, 5249), (3620, 5191)]