79802020

素因数分解:

$2^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{9007}}^1$

素因数の和:9459

約数の個数: 24

約数和(自身を含む): 167981184

約数和(自身を除く): 88179164

約数列:

[1, 2, 4, 5, 10, 20, 443, 886, 1772, 2215, 4430, 8860, 9007, 18014, 36028, 45035, 90070, 180140, 3990101, 7980202, 15960404, 19950505, 39901010, 79802020]

約数ペア:

[(1, 79802020), (2, 39901010), (4, 19950505), (5, 15960404), (10, 7980202), (20, 3990101), (443, 180140), (886, 90070), (1772, 45035), (2215, 36028), (4430, 18014), (8860, 9007)]