313638140

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{39107}}^1$

素因数の和:39517

約数の個数: 24

約数和(自身を含む): 660299472

約数和(自身を除く): 346661332

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 4010, 8020, 39107, 78214, 156428, 195535, 391070, 782140, 15681907, 31363814, 62727628, 78409535, 156819070, 313638140]

約数ペア:

[(1, 313638140), (2, 156819070), (4, 78409535), (5, 62727628), (10, 31363814), (20, 15681907), (401, 782140), (802, 391070), (1604, 195535), (2005, 156428), (4010, 78214), (8020, 39107)]