19871020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{5879}}^1$

素因数の和:5914

約数の個数: 36

約数和(自身を含む): 45193680

約数和(自身を除く): 25322660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 5879, 11758, 23516, 29395, 58790, 76427, 117580, 152854, 305708, 382135, 764270, 993551, 1528540, 1987102, 3974204, 4967755, 9935510, 19871020]

約数ペア:

[(1, 19871020), (2, 9935510), (4, 4967755), (5, 3974204), (10, 1987102), (13, 1528540), (20, 993551), (26, 764270), (52, 382135), (65, 305708), (130, 152854), (169, 117580), (260, 76427), (338, 58790), (676, 29395), (845, 23516), (1690, 11758), (3380, 5879)]