81397820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{83059}}^1$

素因数の和:83082

約数の個数: 36

約数和(自身を含む): 198845640

約数和(自身を除く): 117447820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 83059, 166118, 332236, 415295, 581413, 830590, 1162826, 1661180, 2325652, 2907065, 4069891, 5814130, 8139782, 11628260, 16279564, 20349455, 40698910, 81397820]

約数ペア:

[(1, 81397820), (2, 40698910), (4, 20349455), (5, 16279564), (7, 11628260), (10, 8139782), (14, 5814130), (20, 4069891), (28, 2907065), (35, 2325652), (49, 1661180), (70, 1162826), (98, 830590), (140, 581413), (196, 415295), (245, 332236), (490, 166118), (980, 83059)]