20529320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{467}}^1$

素因数の和:642

約数の個数: 64

約数和(自身を含む): 53239680

約数和(自身を除く): 32710360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 157, 280, 314, 467, 628, 785, 934, 1099, 1256, 1570, 1868, 2198, 2335, 3140, 3269, 3736, 4396, 4670, 5495, 6280, 6538, 8792, 9340, 10990, 13076, 16345, 18680, 21980, 26152, 32690, 43960, 65380, 73319, 130760, 146638, 293276, 366595, 513233, 586552, 733190, 1026466, 1466380, 2052932, 2566165, 2932760, 4105864, 5132330, 10264660, 20529320]

約数ペア:

[(1, 20529320), (2, 10264660), (4, 5132330), (5, 4105864), (7, 2932760), (8, 2566165), (10, 2052932), (14, 1466380), (20, 1026466), (28, 733190), (35, 586552), (40, 513233), (56, 366595), (70, 293276), (140, 146638), (157, 130760), (280, 73319), (314, 65380), (467, 43960), (628, 32690), (785, 26152), (934, 21980), (1099, 18680), (1256, 16345), (1570, 13076), (1868, 10990), (2198, 9340), (2335, 8792), (3140, 6538), (3269, 6280), (3736, 5495), (4396, 4670)]