20820969

素因数分解:

$3^6\times {\mathrm{13}}^4$

素因数の和:70

約数の個数: 35

約数和(自身を含む): 33818513

約数和(自身を除く): 12997544

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 169, 243, 351, 507, 729, 1053, 1521, 2197, 3159, 4563, 6591, 9477, 13689, 19773, 28561, 41067, 59319, 85683, 123201, 177957, 257049, 533871, 771147, 1601613, 2313441, 6940323, 20820969]

約数ペア:

[(1, 20820969), (3, 6940323), (9, 2313441), (13, 1601613), (27, 771147), (39, 533871), (81, 257049), (117, 177957), (169, 123201), (243, 85683), (351, 59319), (507, 41067), (729, 28561), (1053, 19773), (1521, 13689), (2197, 9477), (3159, 6591)]