890336420

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{223}}^1\times {\mathrm{2243}}^1$

素因数の和:2564

約数の個数: 48

約数和(自身を含む): 1900039680

約数和(自身を除く): 1009703260

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 223, 356, 445, 446, 890, 892, 1115, 1780, 2230, 2243, 4460, 4486, 8972, 11215, 19847, 22430, 39694, 44860, 79388, 99235, 198470, 199627, 396940, 399254, 500189, 798508, 998135, 1000378, 1996270, 2000756, 2500945, 3992540, 5001890, 10003780, 44516821, 89033642, 178067284, 222584105, 445168210, 890336420]

約数ペア:

[(1, 890336420), (2, 445168210), (4, 222584105), (5, 178067284), (10, 89033642), (20, 44516821), (89, 10003780), (178, 5001890), (223, 3992540), (356, 2500945), (445, 2000756), (446, 1996270), (890, 1000378), (892, 998135), (1115, 798508), (1780, 500189), (2230, 399254), (2243, 396940), (4460, 199627), (4486, 198470), (8972, 99235), (11215, 79388), (19847, 44860), (22430, 39694)]