21235390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{2719}}^1$

素因数の和:2808

約数の個数: 32

約数和(自身を含む): 42301440

約数和(自身を除く): 21066050

約数列:

[1, 2, 5, 10, 11, 22, 55, 71, 110, 142, 355, 710, 781, 1562, 2719, 3905, 5438, 7810, 13595, 27190, 29909, 59818, 149545, 193049, 299090, 386098, 965245, 1930490, 2123539, 4247078, 10617695, 21235390]

約数ペア:

[(1, 21235390), (2, 10617695), (5, 4247078), (10, 2123539), (11, 1930490), (22, 965245), (55, 386098), (71, 299090), (110, 193049), (142, 149545), (355, 59818), (710, 29909), (781, 27190), (1562, 13595), (2719, 7810), (3905, 5438)]