20828871

素因数分解:

$3^2\times 7^2\times {\mathrm{73}}^1\times {\mathrm{647}}^1$

素因数の和:740

約数の個数: 36

約数和(自身を含む): 35532432

約数和(自身を除く): 14703561

約数列:

[1, 3, 7, 9, 21, 49, 63, 73, 147, 219, 441, 511, 647, 657, 1533, 1941, 3577, 4529, 4599, 5823, 10731, 13587, 31703, 32193, 40761, 47231, 95109, 141693, 285327, 330617, 425079, 991851, 2314319, 2975553, 6942957, 20828871]

約数ペア:

[(1, 20828871), (3, 6942957), (7, 2975553), (9, 2314319), (21, 991851), (49, 425079), (63, 330617), (73, 285327), (147, 141693), (219, 95109), (441, 47231), (511, 40761), (647, 32193), (657, 31703), (1533, 13587), (1941, 10731), (3577, 5823), (4529, 4599)]