9781640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:123

約数の個数: 96

約数和(自身を含む): 25280640

約数和(自身を除く): 15499000

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 47, 55, 86, 88, 94, 110, 121, 172, 188, 215, 220, 235, 242, 344, 376, 430, 440, 470, 473, 484, 517, 605, 860, 940, 946, 968, 1034, 1210, 1720, 1880, 1892, 2021, 2068, 2365, 2420, 2585, 3784, 4042, 4136, 4730, 4840, 5170, 5203, 5687, 8084, 9460, 10105, 10340, 10406, 11374, 16168, 18920, 20210, 20680, 20812, 22231, 22748, 26015, 28435, 40420, 41624, 44462, 45496, 52030, 56870, 80840, 88924, 104060, 111155, 113740, 177848, 208120, 222310, 227480, 244541, 444620, 489082, 889240, 978164, 1222705, 1956328, 2445410, 4890820, 9781640]

約数ペア:

[(1, 9781640), (2, 4890820), (4, 2445410), (5, 1956328), (8, 1222705), (10, 978164), (11, 889240), (20, 489082), (22, 444620), (40, 244541), (43, 227480), (44, 222310), (47, 208120), (55, 177848), (86, 113740), (88, 111155), (94, 104060), (110, 88924), (121, 80840), (172, 56870), (188, 52030), (215, 45496), (220, 44462), (235, 41624), (242, 40420), (344, 28435), (376, 26015), (430, 22748), (440, 22231), (470, 20812), (473, 20680), (484, 20210), (517, 18920), (605, 16168), (860, 11374), (940, 10406), (946, 10340), (968, 10105), (1034, 9460), (1210, 8084), (1720, 5687), (1880, 5203), (1892, 5170), (2021, 4840), (2068, 4730), (2365, 4136), (2420, 4042), (2585, 3784)]