20870480

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{6067}}^1$

素因数の和:6123

約数の個数: 40

約数和(自身を含む): 49660512

約数和(自身を除く): 28790032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 6067, 12134, 24268, 30335, 48536, 60670, 97072, 121340, 242680, 260881, 485360, 521762, 1043524, 1304405, 2087048, 2608810, 4174096, 5217620, 10435240, 20870480]

約数ペア:

[(1, 20870480), (2, 10435240), (4, 5217620), (5, 4174096), (8, 2608810), (10, 2087048), (16, 1304405), (20, 1043524), (40, 521762), (43, 485360), (80, 260881), (86, 242680), (172, 121340), (215, 97072), (344, 60670), (430, 48536), (688, 30335), (860, 24268), (1720, 12134), (3440, 6067)]