21645415

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{241}}^1$

素因数の和:351

約数の個数: 32

約数和(自身を含む): 30108672

約数和(自身を除く): 8463257

約数列:

[1, 5, 11, 23, 55, 71, 115, 241, 253, 355, 781, 1205, 1265, 1633, 2651, 3905, 5543, 8165, 13255, 17111, 17963, 27715, 60973, 85555, 89815, 188221, 304865, 393553, 941105, 1967765, 4329083, 21645415]

約数ペア:

[(1, 21645415), (5, 4329083), (11, 1967765), (23, 941105), (55, 393553), (71, 304865), (115, 188221), (241, 89815), (253, 85555), (355, 60973), (781, 27715), (1205, 17963), (1265, 17111), (1633, 13255), (2651, 8165), (3905, 5543)]