20444450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{443}}^1$

素因数の和:539

約数の個数: 48

約数和(自身を含む): 41622336

約数和(自身を除く): 21177886

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 71, 130, 142, 325, 355, 443, 650, 710, 886, 923, 1775, 1846, 2215, 3550, 4430, 4615, 5759, 9230, 11075, 11518, 22150, 23075, 28795, 31453, 46150, 57590, 62906, 143975, 157265, 287950, 314530, 408889, 786325, 817778, 1572650, 2044445, 4088890, 10222225, 20444450]

約数ペア:

[(1, 20444450), (2, 10222225), (5, 4088890), (10, 2044445), (13, 1572650), (25, 817778), (26, 786325), (50, 408889), (65, 314530), (71, 287950), (130, 157265), (142, 143975), (325, 62906), (355, 57590), (443, 46150), (650, 31453), (710, 28795), (886, 23075), (923, 22150), (1775, 11518), (1846, 11075), (2215, 9230), (3550, 5759), (4430, 4615)]