20395580

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{223}}^1\times {\mathrm{269}}^1$

素因数の和:518

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 25327300

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 223, 269, 340, 446, 538, 892, 1076, 1115, 1345, 2230, 2690, 3791, 4460, 4573, 5380, 7582, 9146, 15164, 18292, 18955, 22865, 37910, 45730, 59987, 75820, 91460, 119974, 239948, 299935, 599870, 1019779, 1199740, 2039558, 4079116, 5098895, 10197790, 20395580]

約数ペア:

[(1, 20395580), (2, 10197790), (4, 5098895), (5, 4079116), (10, 2039558), (17, 1199740), (20, 1019779), (34, 599870), (68, 299935), (85, 239948), (170, 119974), (223, 91460), (269, 75820), (340, 59987), (446, 45730), (538, 37910), (892, 22865), (1076, 18955), (1115, 18292), (1345, 15164), (2230, 9146), (2690, 7582), (3791, 5380), (4460, 4573)]