80665870

素因数分解:

$2^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1\times {\mathrm{443}}^1$

素因数の和:720

約数の個数: 32

約数和(自身を含む): 147692160

約数和(自身を除く): 67026290

約数列:

[1, 2, 5, 10, 131, 139, 262, 278, 443, 655, 695, 886, 1310, 1390, 2215, 4430, 18209, 36418, 58033, 61577, 91045, 116066, 123154, 182090, 290165, 307885, 580330, 615770, 8066587, 16133174, 40332935, 80665870]

約数ペア:

[(1, 80665870), (2, 40332935), (5, 16133174), (10, 8066587), (131, 615770), (139, 580330), (262, 307885), (278, 290165), (443, 182090), (655, 123154), (695, 116066), (886, 91045), (1310, 61577), (1390, 58033), (2215, 36418), (4430, 18209)]