21315265

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{619}}^1$

素因数の和:792

約数の個数: 16

約数和(自身を含む): 26248320

約数和(自身を除く): 4933055

約数列:

[1, 5, 71, 97, 355, 485, 619, 3095, 6887, 34435, 43949, 60043, 219745, 300215, 4263053, 21315265]

約数ペア:

[(1, 21315265), (5, 4263053), (71, 300215), (97, 219745), (355, 60043), (485, 43949), (619, 34435), (3095, 6887)]