20782637561

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{149}}^1\times {\mathrm{397}}^1\times {\mathrm{947}}^1$

素因数の和:1553

約数の個数: 32

約数和(自身を含む): 24449299200

約数和(自身を除く): 3666661639

約数列:

[1, 7, 53, 149, 371, 397, 947, 1043, 2779, 6629, 7897, 21041, 50191, 55279, 59153, 141103, 147287, 351337, 375959, 414071, 987721, 2631713, 3135109, 7478459, 19925827, 21945763, 52349213, 56017891, 139480789, 392125237, 2968948223, 20782637561]

約数ペア:

[(1, 20782637561), (7, 2968948223), (53, 392125237), (149, 139480789), (371, 56017891), (397, 52349213), (947, 21945763), (1043, 19925827), (2779, 7478459), (6629, 3135109), (7897, 2631713), (21041, 987721), (50191, 414071), (55279, 375959), (59153, 351337), (141103, 147287)]