81571516

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{191}}^2$

素因数の和:442

約数の個数: 36

約数和(自身を含む): 158133976

約数和(自身を除く): 76562460

約数列:

[1, 2, 4, 13, 26, 43, 52, 86, 172, 191, 382, 559, 764, 1118, 2236, 2483, 4966, 8213, 9932, 16426, 32852, 36481, 72962, 106769, 145924, 213538, 427076, 474253, 948506, 1568683, 1897012, 3137366, 6274732, 20392879, 40785758, 81571516]

約数ペア:

[(1, 81571516), (2, 40785758), (4, 20392879), (13, 6274732), (26, 3137366), (43, 1897012), (52, 1568683), (86, 948506), (172, 474253), (191, 427076), (382, 213538), (559, 145924), (764, 106769), (1118, 72962), (2236, 36481), (2483, 32852), (4966, 16426), (8213, 9932)]