1780880

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{197}}^1$

素因数の和:323

約数の個数: 40

約数和(自身を含む): 4198392

約数和(自身を除く): 2417512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 197, 226, 394, 452, 565, 788, 904, 985, 1130, 1576, 1808, 1970, 2260, 3152, 3940, 4520, 7880, 9040, 15760, 22261, 44522, 89044, 111305, 178088, 222610, 356176, 445220, 890440, 1780880]

約数ペア:

[(1, 1780880), (2, 890440), (4, 445220), (5, 356176), (8, 222610), (10, 178088), (16, 111305), (20, 89044), (40, 44522), (80, 22261), (113, 15760), (197, 9040), (226, 7880), (394, 4520), (452, 3940), (565, 3152), (788, 2260), (904, 1970), (985, 1808), (1130, 1576)]