81804280

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{14713}}^1$

素因数の和:14863

約数の個数: 32

約数和(自身を含む): 185396400

約数和(自身を除く): 103592120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 5560, 14713, 29426, 58852, 73565, 117704, 147130, 294260, 588520, 2045107, 4090214, 8180428, 10225535, 16360856, 20451070, 40902140, 81804280]

約数ペア:

[(1, 81804280), (2, 40902140), (4, 20451070), (5, 16360856), (8, 10225535), (10, 8180428), (20, 4090214), (40, 2045107), (139, 588520), (278, 294260), (556, 147130), (695, 117704), (1112, 73565), (1390, 58852), (2780, 29426), (5560, 14713)]