21218988

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{252607}}^1$

素因数の和:252621

約数の個数: 24

約数和(自身を含む): 56584192

約数和(自身を除く): 35365204

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 252607, 505214, 757821, 1010428, 1515642, 1768249, 3031284, 3536498, 5304747, 7072996, 10609494, 21218988]

約数ペア:

[(1, 21218988), (2, 10609494), (3, 7072996), (4, 5304747), (6, 3536498), (7, 3031284), (12, 1768249), (14, 1515642), (21, 1010428), (28, 757821), (42, 505214), (84, 252607)]