20305880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1543}}^1$

素因数の和:1608

約数の個数: 64

約数和(自身を含む): 53360640

約数和(自身を除く): 33054760

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, 1543, 1645, 1880, 2632, 3086, 3290, 6172, 6580, 7715, 10801, 12344, 13160, 15430, 21602, 30860, 43204, 54005, 61720, 72521, 86408, 108010, 145042, 216020, 290084, 362605, 432040, 507647, 580168, 725210, 1015294, 1450420, 2030588, 2538235, 2900840, 4061176, 5076470, 10152940, 20305880]

約数ペア:

[(1, 20305880), (2, 10152940), (4, 5076470), (5, 4061176), (7, 2900840), (8, 2538235), (10, 2030588), (14, 1450420), (20, 1015294), (28, 725210), (35, 580168), (40, 507647), (47, 432040), (56, 362605), (70, 290084), (94, 216020), (140, 145042), (188, 108010), (235, 86408), (280, 72521), (329, 61720), (376, 54005), (470, 43204), (658, 30860), (940, 21602), (1316, 15430), (1543, 13160), (1645, 12344), (1880, 10801), (2632, 7715), (3086, 6580), (3290, 6172)]