18870560

素因数分解:

$2^5\times 5^1\times {\mathrm{59}}^1\times {\mathrm{1999}}^1$

素因数の和:2073

約数の個数: 48

約数和(自身を含む): 45360000

約数和(自身を除く): 26489440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 80, 118, 160, 236, 295, 472, 590, 944, 1180, 1888, 1999, 2360, 3998, 4720, 7996, 9440, 9995, 15992, 19990, 31984, 39980, 63968, 79960, 117941, 159920, 235882, 319840, 471764, 589705, 943528, 1179410, 1887056, 2358820, 3774112, 4717640, 9435280, 18870560]

約数ペア:

[(1, 18870560), (2, 9435280), (4, 4717640), (5, 3774112), (8, 2358820), (10, 1887056), (16, 1179410), (20, 943528), (32, 589705), (40, 471764), (59, 319840), (80, 235882), (118, 159920), (160, 117941), (236, 79960), (295, 63968), (472, 39980), (590, 31984), (944, 19990), (1180, 15992), (1888, 9995), (1999, 9440), (2360, 7996), (3998, 4720)]