640845110

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{191}}^1\times {\mathrm{17659}}^1$

素因数の和:17876

約数の個数: 32

約数和(自身を含む): 1220659200

約数和(自身を除く): 579814090

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 191, 382, 955, 1910, 3629, 7258, 17659, 18145, 35318, 36290, 88295, 176590, 335521, 671042, 1677605, 3355210, 3372869, 6745738, 16864345, 33728690, 64084511, 128169022, 320422555, 640845110]

約数ペア:

[(1, 640845110), (2, 320422555), (5, 128169022), (10, 64084511), (19, 33728690), (38, 16864345), (95, 6745738), (190, 3372869), (191, 3355210), (382, 1677605), (955, 671042), (1910, 335521), (3629, 176590), (7258, 88295), (17659, 36290), (18145, 35318)]