20155820

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1019}}^1$

素因数の和:1094

約数の個数: 48

約数和(自身を含む): 45239040

約数和(自身を除く): 25083220

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1019, 1978, 2038, 3956, 4076, 4945, 5095, 9890, 10190, 19780, 20380, 23437, 43817, 46874, 87634, 93748, 117185, 175268, 219085, 234370, 438170, 468740, 876340, 1007791, 2015582, 4031164, 5038955, 10077910, 20155820]

約数ペア:

[(1, 20155820), (2, 10077910), (4, 5038955), (5, 4031164), (10, 2015582), (20, 1007791), (23, 876340), (43, 468740), (46, 438170), (86, 234370), (92, 219085), (115, 175268), (172, 117185), (215, 93748), (230, 87634), (430, 46874), (460, 43817), (860, 23437), (989, 20380), (1019, 19780), (1978, 10190), (2038, 9890), (3956, 5095), (4076, 4945)]