21578420

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{20357}}^1$

素因数の和:20419

約数の個数: 24

約数和(自身を含む): 46171944

約数和(自身を除く): 24593524

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 20357, 40714, 81428, 101785, 203570, 407140, 1078921, 2157842, 4315684, 5394605, 10789210, 21578420]

約数ペア:

[(1, 21578420), (2, 10789210), (4, 5394605), (5, 4315684), (10, 2157842), (20, 1078921), (53, 407140), (106, 203570), (212, 101785), (265, 81428), (530, 40714), (1060, 20357)]