21242945

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{61}}^1\times {\mathrm{241}}^1$

素因数の和:341

約数の個数: 24

約数和(自身を含む): 27637368

約数和(自身を除く): 6394423

約数列:

[1, 5, 17, 61, 85, 241, 289, 305, 1037, 1205, 1445, 4097, 5185, 14701, 17629, 20485, 69649, 73505, 88145, 249917, 348245, 1249585, 4248589, 21242945]

約数ペア:

[(1, 21242945), (5, 4248589), (17, 1249585), (61, 348245), (85, 249917), (241, 88145), (289, 73505), (305, 69649), (1037, 20485), (1205, 17629), (1445, 14701), (4097, 5185)]