18961615

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{1723}}^1$

素因数の和:1830

約数の個数: 16

約数和(自身を含む): 23832576

約数和(自身を除く): 4870961

約数列:

[1, 5, 31, 71, 155, 355, 1723, 2201, 8615, 11005, 53413, 122333, 267065, 611665, 3792323, 18961615]

約数ペア:

[(1, 18961615), (5, 3792323), (31, 611665), (71, 267065), (155, 122333), (355, 53413), (1723, 11005), (2201, 8615)]