20637820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21059}}^1$

素因数の和:21082

約数の個数: 36

約数和(自身を含む): 50417640

約数和(自身を除く): 29779820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21059, 42118, 84236, 105295, 147413, 210590, 294826, 421180, 589652, 737065, 1031891, 1474130, 2063782, 2948260, 4127564, 5159455, 10318910, 20637820]

約数ペア:

[(1, 20637820), (2, 10318910), (4, 5159455), (5, 4127564), (7, 2948260), (10, 2063782), (14, 1474130), (20, 1031891), (28, 737065), (35, 589652), (49, 421180), (70, 294826), (98, 210590), (140, 147413), (196, 105295), (245, 84236), (490, 42118), (980, 21059)]