20621720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1567}}^1$

素因数の和:1632

約数の個数: 64

約数和(自身を含む): 54190080

約数和(自身を除く): 33568360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 47, 56, 70, 94, 140, 188, 235, 280, 329, 376, 470, 658, 940, 1316, 1567, 1645, 1880, 2632, 3134, 3290, 6268, 6580, 7835, 10969, 12536, 13160, 15670, 21938, 31340, 43876, 54845, 62680, 73649, 87752, 109690, 147298, 219380, 294596, 368245, 438760, 515543, 589192, 736490, 1031086, 1472980, 2062172, 2577715, 2945960, 4124344, 5155430, 10310860, 20621720]

約数ペア:

[(1, 20621720), (2, 10310860), (4, 5155430), (5, 4124344), (7, 2945960), (8, 2577715), (10, 2062172), (14, 1472980), (20, 1031086), (28, 736490), (35, 589192), (40, 515543), (47, 438760), (56, 368245), (70, 294596), (94, 219380), (140, 147298), (188, 109690), (235, 87752), (280, 73649), (329, 62680), (376, 54845), (470, 43876), (658, 31340), (940, 21938), (1316, 15670), (1567, 13160), (1645, 12536), (1880, 10969), (2632, 7835), (3134, 6580), (3290, 6268)]