21688654

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{379}}^1$

素因数の和:496

約数の個数: 32

約数和(自身を含む): 36771840

約数和(自身を除く): 15083186

約数列:

[1, 2, 13, 26, 31, 62, 71, 142, 379, 403, 758, 806, 923, 1846, 2201, 4402, 4927, 9854, 11749, 23498, 26909, 28613, 53818, 57226, 152737, 305474, 349817, 699634, 834179, 1668358, 10844327, 21688654]

約数ペア:

[(1, 21688654), (2, 10844327), (13, 1668358), (26, 834179), (31, 699634), (62, 349817), (71, 305474), (142, 152737), (379, 57226), (403, 53818), (758, 28613), (806, 26909), (923, 23498), (1846, 11749), (2201, 9854), (4402, 4927)]