12691880

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 30032640

約数和(自身を除く): 17340760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 47, 86, 94, 157, 172, 188, 215, 235, 314, 344, 376, 430, 470, 628, 785, 860, 940, 1256, 1570, 1720, 1880, 2021, 3140, 4042, 6280, 6751, 7379, 8084, 10105, 13502, 14758, 16168, 20210, 27004, 29516, 33755, 36895, 40420, 54008, 59032, 67510, 73790, 80840, 135020, 147580, 270040, 295160, 317297, 634594, 1269188, 1586485, 2538376, 3172970, 6345940, 12691880]

約数ペア:

[(1, 12691880), (2, 6345940), (4, 3172970), (5, 2538376), (8, 1586485), (10, 1269188), (20, 634594), (40, 317297), (43, 295160), (47, 270040), (86, 147580), (94, 135020), (157, 80840), (172, 73790), (188, 67510), (215, 59032), (235, 54008), (314, 40420), (344, 36895), (376, 33755), (430, 29516), (470, 27004), (628, 20210), (785, 16168), (860, 14758), (940, 13502), (1256, 10105), (1570, 8084), (1720, 7379), (1880, 6751), (2021, 6280), (3140, 4042)]