66851240

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{38867}}^1$

素因数の和:38921

約数の個数: 32

約数和(自身を含む): 153917280

約数和(自身を除く): 87066040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 38867, 77734, 155468, 194335, 310936, 388670, 777340, 1554680, 1671281, 3342562, 6685124, 8356405, 13370248, 16712810, 33425620, 66851240]

約数ペア:

[(1, 66851240), (2, 33425620), (4, 16712810), (5, 13370248), (8, 8356405), (10, 6685124), (20, 3342562), (40, 1671281), (43, 1554680), (86, 777340), (172, 388670), (215, 310936), (344, 194335), (430, 155468), (860, 77734), (1720, 38867)]