21153418

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1999}}^1$

素因数の和:2062

約数の個数: 32

約数和(自身を含む): 38304000

約数和(自身を除く): 17150582

約数列:

[1, 2, 11, 13, 22, 26, 37, 74, 143, 286, 407, 481, 814, 962, 1999, 3998, 5291, 10582, 21989, 25987, 43978, 51974, 73963, 147926, 285857, 571714, 813593, 961519, 1627186, 1923038, 10576709, 21153418]

約数ペア:

[(1, 21153418), (2, 10576709), (11, 1923038), (13, 1627186), (22, 961519), (26, 813593), (37, 571714), (74, 285857), (143, 147926), (286, 73963), (407, 51974), (481, 43978), (814, 25987), (962, 21989), (1999, 10582), (3998, 5291)]