21213856

素因数分解:

$2^5\times {\mathrm{643}}^1\times {\mathrm{1031}}^1$

素因数の和:1684

約数の個数: 24

約数和(自身を含む): 41870304

約数和(自身を除く): 20656448

約数列:

[1, 2, 4, 8, 16, 32, 643, 1031, 1286, 2062, 2572, 4124, 5144, 8248, 10288, 16496, 20576, 32992, 662933, 1325866, 2651732, 5303464, 10606928, 21213856]

約数ペア:

[(1, 21213856), (2, 10606928), (4, 5303464), (8, 2651732), (16, 1325866), (32, 662933), (643, 32992), (1031, 20576), (1286, 16496), (2062, 10288), (2572, 8248), (4124, 5144)]