21567140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1213}}^1$

素因数の和:1356

約数の個数: 48

約数和(自身を含む): 52211712

約数和(自身を除く): 30644572

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1213, 1270, 1778, 2426, 2540, 3556, 4445, 4852, 6065, 8491, 8890, 12130, 16982, 17780, 24260, 33964, 42455, 84910, 154051, 169820, 308102, 616204, 770255, 1078357, 1540510, 2156714, 3081020, 4313428, 5391785, 10783570, 21567140]

約数ペア:

[(1, 21567140), (2, 10783570), (4, 5391785), (5, 4313428), (7, 3081020), (10, 2156714), (14, 1540510), (20, 1078357), (28, 770255), (35, 616204), (70, 308102), (127, 169820), (140, 154051), (254, 84910), (508, 42455), (635, 33964), (889, 24260), (1213, 17780), (1270, 16982), (1778, 12130), (2426, 8890), (2540, 8491), (3556, 6065), (4445, 4852)]