251018840

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{12781}}^1$

素因数の和:13283

約数の個数: 32

約数和(自身を含む): 565986960

約数和(自身を除く): 314968120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1964, 2455, 3928, 4910, 9820, 12781, 19640, 25562, 51124, 63905, 102248, 127810, 255620, 511240, 6275471, 12550942, 25101884, 31377355, 50203768, 62754710, 125509420, 251018840]

約数ペア:

[(1, 251018840), (2, 125509420), (4, 62754710), (5, 50203768), (8, 31377355), (10, 25101884), (20, 12550942), (40, 6275471), (491, 511240), (982, 255620), (1964, 127810), (2455, 102248), (3928, 63905), (4910, 51124), (9820, 25562), (12781, 19640)]