128213560

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{78179}}^1$

素因数の和:78231

約数の個数: 32

約数和(自身を含む): 295520400

約数和(自身を除く): 167306840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 78179, 156358, 312716, 390895, 625432, 781790, 1563580, 3127160, 3205339, 6410678, 12821356, 16026695, 25642712, 32053390, 64106780, 128213560]

約数ペア:

[(1, 128213560), (2, 64106780), (4, 32053390), (5, 25642712), (8, 16026695), (10, 12821356), (20, 6410678), (40, 3205339), (41, 3127160), (82, 1563580), (164, 781790), (205, 625432), (328, 390895), (410, 312716), (820, 156358), (1640, 78179)]