20638653

素因数分解:

$3^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{647}}^1$

素因数の和:702

約数の個数: 32

約数和(自身を含む): 33177600

約数和(自身を除く): 12538947

約数列:

[1, 3, 7, 21, 31, 49, 93, 147, 217, 343, 647, 651, 1029, 1519, 1941, 4529, 4557, 10633, 13587, 20057, 31703, 31899, 60171, 95109, 140399, 221921, 421197, 665763, 982793, 2948379, 6879551, 20638653]

約数ペア:

[(1, 20638653), (3, 6879551), (7, 2948379), (21, 982793), (31, 665763), (49, 421197), (93, 221921), (147, 140399), (217, 95109), (343, 60171), (647, 31899), (651, 31703), (1029, 20057), (1519, 13587), (1941, 10633), (4529, 4557)]