137800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1$

素因数の和:82

約数の個数: 48

約数和(自身を含む): 351540

約数和(自身を除く): 213740

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 53, 65, 100, 104, 106, 130, 200, 212, 260, 265, 325, 424, 520, 530, 650, 689, 1060, 1300, 1325, 1378, 2120, 2600, 2650, 2756, 3445, 5300, 5512, 6890, 10600, 13780, 17225, 27560, 34450, 68900, 137800]

約数ペア:

[(1, 137800), (2, 68900), (4, 34450), (5, 27560), (8, 17225), (10, 13780), (13, 10600), (20, 6890), (25, 5512), (26, 5300), (40, 3445), (50, 2756), (52, 2650), (53, 2600), (65, 2120), (100, 1378), (104, 1325), (106, 1300), (130, 1060), (200, 689), (212, 650), (260, 530), (265, 520), (325, 424)]