21378616

素因数分解:

$2^3\times 7^1\times {\mathrm{381761}}^1$

素因数の和:381774

約数の個数: 16

約数和(自身を含む): 45811440

約数和(自身を除く): 24432824

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 381761, 763522, 1527044, 2672327, 3054088, 5344654, 10689308, 21378616]

約数ペア:

[(1, 21378616), (2, 10689308), (4, 5344654), (7, 3054088), (8, 2672327), (14, 1527044), (28, 763522), (56, 381761)]