20981877

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{263}}^1$

素因数の和:433

約数の個数: 32

約数和(自身を含む): 33454080

約数和(自身を除く): 12472203

約数列:

[1, 3, 7, 21, 29, 87, 131, 203, 263, 393, 609, 789, 917, 1841, 2751, 3799, 5523, 7627, 11397, 22881, 26593, 34453, 53389, 79779, 103359, 160167, 241171, 723513, 999137, 2997411, 6993959, 20981877]

約数ペア:

[(1, 20981877), (3, 6993959), (7, 2997411), (21, 999137), (29, 723513), (87, 241171), (131, 160167), (203, 103359), (263, 79779), (393, 53389), (609, 34453), (789, 26593), (917, 22881), (1841, 11397), (2751, 7627), (3799, 5523)]