21711165

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{109}}^1\times {\mathrm{271}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 40930560

約数和(自身を除く): 19219395

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 109, 147, 245, 271, 327, 545, 735, 763, 813, 1355, 1635, 1897, 2289, 3815, 4065, 5341, 5691, 9485, 11445, 13279, 16023, 26705, 28455, 29539, 39837, 66395, 80115, 88617, 147695, 199185, 206773, 443085, 620319, 1033865, 1447411, 3101595, 4342233, 7237055, 21711165]

約数ペア:

[(1, 21711165), (3, 7237055), (5, 4342233), (7, 3101595), (15, 1447411), (21, 1033865), (35, 620319), (49, 443085), (105, 206773), (109, 199185), (147, 147695), (245, 88617), (271, 80115), (327, 66395), (545, 39837), (735, 29539), (763, 28455), (813, 26705), (1355, 16023), (1635, 13279), (1897, 11445), (2289, 9485), (3815, 5691), (4065, 5341)]