81002720

素因数分解:

$2^5\times 5^1\times {\mathrm{251}}^1\times {\mathrm{2017}}^1$

素因数の和:2283

約数の個数: 48

約数和(自身を含む): 192226608

約数和(自身を除く): 111223888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 251, 502, 1004, 1255, 2008, 2017, 2510, 4016, 4034, 5020, 8032, 8068, 10040, 10085, 16136, 20080, 20170, 32272, 40160, 40340, 64544, 80680, 161360, 322720, 506267, 1012534, 2025068, 2531335, 4050136, 5062670, 8100272, 10125340, 16200544, 20250680, 40501360, 81002720]

約数ペア:

[(1, 81002720), (2, 40501360), (4, 20250680), (5, 16200544), (8, 10125340), (10, 8100272), (16, 5062670), (20, 4050136), (32, 2531335), (40, 2025068), (80, 1012534), (160, 506267), (251, 322720), (502, 161360), (1004, 80680), (1255, 64544), (2008, 40340), (2017, 40160), (2510, 32272), (4016, 20170), (4034, 20080), (5020, 16136), (8032, 10085), (8068, 10040)]