7891780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{239}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 18063360

約数和(自身を除く): 10171580

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 127, 130, 239, 254, 260, 478, 508, 635, 956, 1195, 1270, 1651, 2390, 2540, 3107, 3302, 4780, 6214, 6604, 8255, 12428, 15535, 16510, 30353, 31070, 33020, 60706, 62140, 121412, 151765, 303530, 394589, 607060, 789178, 1578356, 1972945, 3945890, 7891780]

約数ペア:

[(1, 7891780), (2, 3945890), (4, 1972945), (5, 1578356), (10, 789178), (13, 607060), (20, 394589), (26, 303530), (52, 151765), (65, 121412), (127, 62140), (130, 60706), (239, 33020), (254, 31070), (260, 30353), (478, 16510), (508, 15535), (635, 12428), (956, 8255), (1195, 6604), (1270, 6214), (1651, 4780), (2390, 3302), (2540, 3107)]