219757780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{1279}}^1$

素因数の和:1381

約数の個数: 72

約数和(自身を含む): 514805760

約数和(自身を除く): 295047980

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 71, 110, 121, 142, 220, 242, 284, 355, 484, 605, 710, 781, 1210, 1279, 1420, 1562, 2420, 2558, 3124, 3905, 5116, 6395, 7810, 8591, 12790, 14069, 15620, 17182, 25580, 28138, 34364, 42955, 56276, 70345, 85910, 90809, 140690, 154759, 171820, 181618, 281380, 309518, 363236, 454045, 619036, 773795, 908090, 998899, 1547590, 1816180, 1997798, 3095180, 3995596, 4994495, 9988990, 10987889, 19977980, 21975778, 43951556, 54939445, 109878890, 219757780]

約数ペア:

[(1, 219757780), (2, 109878890), (4, 54939445), (5, 43951556), (10, 21975778), (11, 19977980), (20, 10987889), (22, 9988990), (44, 4994495), (55, 3995596), (71, 3095180), (110, 1997798), (121, 1816180), (142, 1547590), (220, 998899), (242, 908090), (284, 773795), (355, 619036), (484, 454045), (605, 363236), (710, 309518), (781, 281380), (1210, 181618), (1279, 171820), (1420, 154759), (1562, 140690), (2420, 90809), (2558, 85910), (3124, 70345), (3905, 56276), (5116, 42955), (6395, 34364), (7810, 28138), (8591, 25580), (12790, 17182), (14069, 15620)]