18974020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72977}}^1$

素因数の和:72999

約数の個数: 24

約数和(自身を含む): 42911064

約数和(自身を除く): 23937044

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72977, 145954, 291908, 364885, 729770, 948701, 1459540, 1897402, 3794804, 4743505, 9487010, 18974020]

約数ペア:

[(1, 18974020), (2, 9487010), (4, 4743505), (5, 3794804), (10, 1897402), (13, 1459540), (20, 948701), (26, 729770), (52, 364885), (65, 291908), (130, 145954), (260, 72977)]