21603920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20773}}^1$

素因数の和:20799

約数の個数: 40

約数和(自身を含む): 54095496

約数和(自身を除く): 32491576

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20773, 41546, 83092, 103865, 166184, 207730, 270049, 332368, 415460, 540098, 830920, 1080196, 1350245, 1661840, 2160392, 2700490, 4320784, 5400980, 10801960, 21603920]

約数ペア:

[(1, 21603920), (2, 10801960), (4, 5400980), (5, 4320784), (8, 2700490), (10, 2160392), (13, 1661840), (16, 1350245), (20, 1080196), (26, 830920), (40, 540098), (52, 415460), (65, 332368), (80, 270049), (104, 207730), (130, 166184), (208, 103865), (260, 83092), (520, 41546), (1040, 20773)]