20900859

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{397}}^1$

素因数の和:539

約数の個数: 32

約数和(自身を含む): 33623040

約数和(自身を除く): 12722181

約数列:

[1, 3, 7, 21, 23, 69, 109, 161, 327, 397, 483, 763, 1191, 2289, 2507, 2779, 7521, 8337, 9131, 17549, 27393, 43273, 52647, 63917, 129819, 191751, 302911, 908733, 995279, 2985837, 6966953, 20900859]

約数ペア:

[(1, 20900859), (3, 6966953), (7, 2985837), (21, 995279), (23, 908733), (69, 302911), (109, 191751), (161, 129819), (327, 63917), (397, 52647), (483, 43273), (763, 27393), (1191, 17549), (2289, 9131), (2507, 8337), (2779, 7521)]