813939

素因数分解:

$3^1\times 7^4\times {\mathrm{113}}^1$

素因数の和:144

約数の個数: 20

約数和(自身を含む): 1277256

約数和(自身を除く): 463317

約数列:

[1, 3, 7, 21, 49, 113, 147, 339, 343, 791, 1029, 2373, 2401, 5537, 7203, 16611, 38759, 116277, 271313, 813939]

約数ペア:

[(1, 813939), (3, 271313), (7, 116277), (21, 38759), (49, 16611), (113, 7203), (147, 5537), (339, 2401), (343, 2373), (791, 1029)]