660400

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{127}}^1$

素因数の和:158

約数の個数: 60

約数和(自身を含む): 1722112

約数和(自身を除く): 1061712

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 50, 52, 65, 80, 100, 104, 127, 130, 200, 208, 254, 260, 325, 400, 508, 520, 635, 650, 1016, 1040, 1270, 1300, 1651, 2032, 2540, 2600, 3175, 3302, 5080, 5200, 6350, 6604, 8255, 10160, 12700, 13208, 16510, 25400, 26416, 33020, 41275, 50800, 66040, 82550, 132080, 165100, 330200, 660400]

約数ペア:

[(1, 660400), (2, 330200), (4, 165100), (5, 132080), (8, 82550), (10, 66040), (13, 50800), (16, 41275), (20, 33020), (25, 26416), (26, 25400), (40, 16510), (50, 13208), (52, 12700), (65, 10160), (80, 8255), (100, 6604), (104, 6350), (127, 5200), (130, 5080), (200, 3302), (208, 3175), (254, 2600), (260, 2540), (325, 2032), (400, 1651), (508, 1300), (520, 1270), (635, 1040), (650, 1016)]