20844890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:263

約数の個数: 64

約数和(自身を含む): 44229888

約数和(自身を除く): 23384998

約数列:

[1, 2, 5, 10, 11, 17, 22, 34, 55, 71, 85, 110, 142, 157, 170, 187, 314, 355, 374, 710, 781, 785, 935, 1207, 1562, 1570, 1727, 1870, 2414, 2669, 3454, 3905, 5338, 6035, 7810, 8635, 11147, 12070, 13277, 13345, 17270, 22294, 26554, 26690, 29359, 55735, 58718, 66385, 111470, 122617, 132770, 146795, 189499, 245234, 293590, 378998, 613085, 947495, 1226170, 1894990, 2084489, 4168978, 10422445, 20844890]

約数ペア:

[(1, 20844890), (2, 10422445), (5, 4168978), (10, 2084489), (11, 1894990), (17, 1226170), (22, 947495), (34, 613085), (55, 378998), (71, 293590), (85, 245234), (110, 189499), (142, 146795), (157, 132770), (170, 122617), (187, 111470), (314, 66385), (355, 58718), (374, 55735), (710, 29359), (781, 26690), (785, 26554), (935, 22294), (1207, 17270), (1562, 13345), (1570, 13277), (1727, 12070), (1870, 11147), (2414, 8635), (2669, 7810), (3454, 6035), (3905, 5338)]