21224997

素因数分解:

$3^4\times {\mathrm{67}}^1\times {\mathrm{3911}}^1$

素因数の和:3990

約数の個数: 20

約数和(自身を含む): 32187936

約数和(自身を除く): 10962939

約数列:

[1, 3, 9, 27, 67, 81, 201, 603, 1809, 3911, 5427, 11733, 35199, 105597, 262037, 316791, 786111, 2358333, 7074999, 21224997]

約数ペア:

[(1, 21224997), (3, 7074999), (9, 2358333), (27, 786111), (67, 316791), (81, 262037), (201, 105597), (603, 35199), (1809, 11733), (3911, 5427)]