21079190

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{2699}}^1$

素因数の和:2788

約数の個数: 32

約数和(自身を含む): 41990400

約数和(自身を除く): 20911210

約数列:

[1, 2, 5, 10, 11, 22, 55, 71, 110, 142, 355, 710, 781, 1562, 2699, 3905, 5398, 7810, 13495, 26990, 29689, 59378, 148445, 191629, 296890, 383258, 958145, 1916290, 2107919, 4215838, 10539595, 21079190]

約数ペア:

[(1, 21079190), (2, 10539595), (5, 4215838), (10, 2107919), (11, 1916290), (22, 958145), (55, 383258), (71, 296890), (110, 191629), (142, 148445), (355, 59378), (710, 29689), (781, 26990), (1562, 13495), (2699, 7810), (3905, 5398)]