19748680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{281}}^1$

素因数の和:550

約数の個数: 64

約数和(自身を含む): 51166080

約数和(自身を除く): 31417400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 251, 280, 281, 502, 562, 1004, 1124, 1255, 1405, 1757, 1967, 2008, 2248, 2510, 2810, 3514, 3934, 5020, 5620, 7028, 7868, 8785, 9835, 10040, 11240, 14056, 15736, 17570, 19670, 35140, 39340, 70280, 70531, 78680, 141062, 282124, 352655, 493717, 564248, 705310, 987434, 1410620, 1974868, 2468585, 2821240, 3949736, 4937170, 9874340, 19748680]

約数ペア:

[(1, 19748680), (2, 9874340), (4, 4937170), (5, 3949736), (7, 2821240), (8, 2468585), (10, 1974868), (14, 1410620), (20, 987434), (28, 705310), (35, 564248), (40, 493717), (56, 352655), (70, 282124), (140, 141062), (251, 78680), (280, 70531), (281, 70280), (502, 39340), (562, 35140), (1004, 19670), (1124, 17570), (1255, 15736), (1405, 14056), (1757, 11240), (1967, 10040), (2008, 9835), (2248, 8785), (2510, 7868), (2810, 7028), (3514, 5620), (3934, 5020)]