21218470

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3331}}^1$

素因数の和:3365

約数の個数: 48

約数和(自身を含む): 47860848

約数和(自身を除く): 26642378

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 49, 65, 70, 91, 98, 130, 182, 245, 455, 490, 637, 910, 1274, 3185, 3331, 6370, 6662, 16655, 23317, 33310, 43303, 46634, 86606, 116585, 163219, 216515, 233170, 303121, 326438, 433030, 606242, 816095, 1515605, 1632190, 2121847, 3031210, 4243694, 10609235, 21218470]

約数ペア:

[(1, 21218470), (2, 10609235), (5, 4243694), (7, 3031210), (10, 2121847), (13, 1632190), (14, 1515605), (26, 816095), (35, 606242), (49, 433030), (65, 326438), (70, 303121), (91, 233170), (98, 216515), (130, 163219), (182, 116585), (245, 86606), (455, 46634), (490, 43303), (637, 33310), (910, 23317), (1274, 16655), (3185, 6662), (3331, 6370)]