21072540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{2237}}^1$

素因数の和:2406

約数の個数: 48

約数和(自身を含む): 59405472

約数和(自身を除く): 38332932

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 157, 314, 471, 628, 785, 942, 1570, 1884, 2237, 2355, 3140, 4474, 4710, 6711, 8948, 9420, 11185, 13422, 22370, 26844, 33555, 44740, 67110, 134220, 351209, 702418, 1053627, 1404836, 1756045, 2107254, 3512090, 4214508, 5268135, 7024180, 10536270, 21072540]

約数ペア:

[(1, 21072540), (2, 10536270), (3, 7024180), (4, 5268135), (5, 4214508), (6, 3512090), (10, 2107254), (12, 1756045), (15, 1404836), (20, 1053627), (30, 702418), (60, 351209), (157, 134220), (314, 67110), (471, 44740), (628, 33555), (785, 26844), (942, 22370), (1570, 13422), (1884, 11185), (2237, 9420), (2355, 8948), (3140, 6711), (4474, 4710)]