216945980

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{211}}^1\times {\mathrm{509}}^1$

素因数の和:830

約数の個数: 48

約数和(自身を含む): 463186080

約数和(自身を除く): 246240100

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 211, 404, 422, 505, 509, 844, 1010, 1018, 1055, 2020, 2036, 2110, 2545, 4220, 5090, 10180, 21311, 42622, 51409, 85244, 102818, 106555, 107399, 205636, 213110, 214798, 257045, 426220, 429596, 514090, 536995, 1028180, 1073990, 2147980, 10847299, 21694598, 43389196, 54236495, 108472990, 216945980]

約数ペア:

[(1, 216945980), (2, 108472990), (4, 54236495), (5, 43389196), (10, 21694598), (20, 10847299), (101, 2147980), (202, 1073990), (211, 1028180), (404, 536995), (422, 514090), (505, 429596), (509, 426220), (844, 257045), (1010, 214798), (1018, 213110), (1055, 205636), (2020, 107399), (2036, 106555), (2110, 102818), (2545, 85244), (4220, 51409), (5090, 42622), (10180, 21311)]