890440

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{197}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 2031480

約数和(自身を除く): 1141040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 197, 226, 394, 452, 565, 788, 904, 985, 1130, 1576, 1970, 2260, 3940, 4520, 7880, 22261, 44522, 89044, 111305, 178088, 222610, 445220, 890440]

約数ペア:

[(1, 890440), (2, 445220), (4, 222610), (5, 178088), (8, 111305), (10, 89044), (20, 44522), (40, 22261), (113, 7880), (197, 4520), (226, 3940), (394, 2260), (452, 1970), (565, 1576), (788, 1130), (904, 985)]