20906909120

素因数分解:

$2^6\times 5^1\times {\mathrm{457}}^1\times {\mathrm{142963}}^1$

素因数の和:143437

約数の個数: 56

約数和(自身を含む): 49893864144

約数和(自身を除く): 28986955024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 457, 914, 1828, 2285, 3656, 4570, 7312, 9140, 14624, 18280, 29248, 36560, 73120, 142963, 146240, 285926, 571852, 714815, 1143704, 1429630, 2287408, 2859260, 4574816, 5718520, 9149632, 11437040, 22874080, 45748160, 65334091, 130668182, 261336364, 326670455, 522672728, 653340910, 1045345456, 1306681820, 2090690912, 2613363640, 4181381824, 5226727280, 10453454560, 20906909120]

約数ペア:

[(1, 20906909120), (2, 10453454560), (4, 5226727280), (5, 4181381824), (8, 2613363640), (10, 2090690912), (16, 1306681820), (20, 1045345456), (32, 653340910), (40, 522672728), (64, 326670455), (80, 261336364), (160, 130668182), (320, 65334091), (457, 45748160), (914, 22874080), (1828, 11437040), (2285, 9149632), (3656, 5718520), (4570, 4574816), (7312, 2859260), (9140, 2287408), (14624, 1429630), (18280, 1143704), (29248, 714815), (36560, 571852), (73120, 285926), (142963, 146240)]