21015615

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{3881}}^1$

素因数の和:3927

約数の個数: 24

約数和(自身を含む): 35497008

約数和(自身を除く): 14481393

約数列:

[1, 3, 5, 15, 19, 57, 95, 285, 361, 1083, 1805, 3881, 5415, 11643, 19405, 58215, 73739, 221217, 368695, 1106085, 1401041, 4203123, 7005205, 21015615]

約数ペア:

[(1, 21015615), (3, 7005205), (5, 4203123), (15, 1401041), (19, 1106085), (57, 368695), (95, 221217), (285, 73739), (361, 58215), (1083, 19405), (1805, 11643), (3881, 5415)]