21778647

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{349}}^1$

素因数の和:455

約数の個数: 32

約数和(自身を含む): 33331200

約数和(自身を除く): 11552553

約数列:

[1, 3, 11, 31, 33, 61, 93, 183, 341, 349, 671, 1023, 1047, 1891, 2013, 3839, 5673, 10819, 11517, 20801, 21289, 32457, 62403, 63867, 119009, 234179, 357027, 659959, 702537, 1979877, 7259549, 21778647]

約数ペア:

[(1, 21778647), (3, 7259549), (11, 1979877), (31, 702537), (33, 659959), (61, 357027), (93, 234179), (183, 119009), (341, 63867), (349, 62403), (671, 32457), (1023, 21289), (1047, 20801), (1891, 11517), (2013, 10819), (3839, 5673)]