21464560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20639}}^1$

素因数の和:20665

約数の個数: 40

約数和(自身を含む): 53746560

約数和(自身を除く): 32282000

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20639, 41278, 82556, 103195, 165112, 206390, 268307, 330224, 412780, 536614, 825560, 1073228, 1341535, 1651120, 2146456, 2683070, 4292912, 5366140, 10732280, 21464560]

約数ペア:

[(1, 21464560), (2, 10732280), (4, 5366140), (5, 4292912), (8, 2683070), (10, 2146456), (13, 1651120), (16, 1341535), (20, 1073228), (26, 825560), (40, 536614), (52, 412780), (65, 330224), (80, 268307), (104, 206390), (130, 165112), (208, 103195), (260, 82556), (520, 41278), (1040, 20639)]