20684560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19889}}^1$

素因数の和:19915

約数の個数: 40

約数和(自身を含む): 51793560

約数和(自身を除く): 31109000

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19889, 39778, 79556, 99445, 159112, 198890, 258557, 318224, 397780, 517114, 795560, 1034228, 1292785, 1591120, 2068456, 2585570, 4136912, 5171140, 10342280, 20684560]

約数ペア:

[(1, 20684560), (2, 10342280), (4, 5171140), (5, 4136912), (8, 2585570), (10, 2068456), (13, 1591120), (16, 1292785), (20, 1034228), (26, 795560), (40, 517114), (52, 397780), (65, 318224), (80, 258557), (104, 198890), (130, 159112), (208, 99445), (260, 79556), (520, 39778), (1040, 19889)]