18981040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{18251}}^1$

素因数の和:18277

約数の個数: 40

約数和(自身を含む): 47528208

約数和(自身を除く): 28547168

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 18251, 36502, 73004, 91255, 146008, 182510, 237263, 292016, 365020, 474526, 730040, 949052, 1186315, 1460080, 1898104, 2372630, 3796208, 4745260, 9490520, 18981040]

約数ペア:

[(1, 18981040), (2, 9490520), (4, 4745260), (5, 3796208), (8, 2372630), (10, 1898104), (13, 1460080), (16, 1186315), (20, 949052), (26, 730040), (40, 474526), (52, 365020), (65, 292016), (80, 237263), (104, 182510), (130, 146008), (208, 91255), (260, 73004), (520, 36502), (1040, 18251)]