21385136

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{21911}}^1$

素因数の和:21980

約数の個数: 20

約数和(自身を含む): 42114864

約数和(自身を除く): 20729728

約数列:

[1, 2, 4, 8, 16, 61, 122, 244, 488, 976, 21911, 43822, 87644, 175288, 350576, 1336571, 2673142, 5346284, 10692568, 21385136]

約数ペア:

[(1, 21385136), (2, 10692568), (4, 5346284), (8, 2673142), (16, 1336571), (61, 350576), (122, 175288), (244, 87644), (488, 43822), (976, 21911)]