21307869

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{2131}}^1$

素因数の和:2249

約数の個数: 24

約数和(自身を含む): 33924384

約数和(自身を除く): 12616515

約数列:

[1, 3, 9, 11, 33, 99, 101, 303, 909, 1111, 2131, 3333, 6393, 9999, 19179, 23441, 70323, 210969, 215231, 645693, 1937079, 2367541, 7102623, 21307869]

約数ペア:

[(1, 21307869), (3, 7102623), (9, 2367541), (11, 1937079), (33, 645693), (99, 215231), (101, 210969), (303, 70323), (909, 23441), (1111, 19179), (2131, 9999), (3333, 6393)]