21032715

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{6709}}^1$

素因数の和:6747

約数の個数: 32

約数和(自身を含む): 38649600

約数和(自身を除く): 17616885

約数列:

[1, 3, 5, 11, 15, 19, 33, 55, 57, 95, 165, 209, 285, 627, 1045, 3135, 6709, 20127, 33545, 73799, 100635, 127471, 221397, 368995, 382413, 637355, 1106985, 1402181, 1912065, 4206543, 7010905, 21032715]

約数ペア:

[(1, 21032715), (3, 7010905), (5, 4206543), (11, 1912065), (15, 1402181), (19, 1106985), (33, 637355), (55, 382413), (57, 368995), (95, 221397), (165, 127471), (209, 100635), (285, 73799), (627, 33545), (1045, 20127), (3135, 6709)]