20897140

素因数分解:

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

素因数の和:157

約数の個数: 72

約数和(自身を含む): 50051232

約数和(自身を除く): 29154092

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 43, 44, 47, 55, 86, 94, 110, 172, 188, 215, 220, 235, 430, 470, 473, 517, 860, 940, 946, 1034, 1892, 2021, 2068, 2209, 2365, 2585, 4042, 4418, 4730, 5170, 8084, 8836, 9460, 10105, 10340, 11045, 20210, 22090, 22231, 24299, 40420, 44180, 44462, 48598, 88924, 94987, 97196, 111155, 121495, 189974, 222310, 242990, 379948, 444620, 474935, 485980, 949870, 1044857, 1899740, 2089714, 4179428, 5224285, 10448570, 20897140]

約数ペア:

[(1, 20897140), (2, 10448570), (4, 5224285), (5, 4179428), (10, 2089714), (11, 1899740), (20, 1044857), (22, 949870), (43, 485980), (44, 474935), (47, 444620), (55, 379948), (86, 242990), (94, 222310), (110, 189974), (172, 121495), (188, 111155), (215, 97196), (220, 94987), (235, 88924), (430, 48598), (470, 44462), (473, 44180), (517, 40420), (860, 24299), (940, 22231), (946, 22090), (1034, 20210), (1892, 11045), (2021, 10340), (2068, 10105), (2209, 9460), (2365, 8836), (2585, 8084), (4042, 5170), (4418, 4730)]