401264840

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{20431}}^1$

素因数の和:20933

約数の個数: 32

約数和(自身を含む): 904728960

約数和(自身を除く): 503464120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1964, 2455, 3928, 4910, 9820, 19640, 20431, 40862, 81724, 102155, 163448, 204310, 408620, 817240, 10031621, 20063242, 40126484, 50158105, 80252968, 100316210, 200632420, 401264840]

約数ペア:

[(1, 401264840), (2, 200632420), (4, 100316210), (5, 80252968), (8, 50158105), (10, 40126484), (20, 20063242), (40, 10031621), (491, 817240), (982, 408620), (1964, 204310), (2455, 163448), (3928, 102155), (4910, 81724), (9820, 40862), (19640, 20431)]