21984560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{21139}}^1$

素因数の和:21165

約数の個数: 40

約数和(自身を含む): 55048560

約数和(自身を除く): 33064000

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 21139, 42278, 84556, 105695, 169112, 211390, 274807, 338224, 422780, 549614, 845560, 1099228, 1374035, 1691120, 2198456, 2748070, 4396912, 5496140, 10992280, 21984560]

約数ペア:

[(1, 21984560), (2, 10992280), (4, 5496140), (5, 4396912), (8, 2748070), (10, 2198456), (13, 1691120), (16, 1374035), (20, 1099228), (26, 845560), (40, 549614), (52, 422780), (65, 338224), (80, 274807), (104, 211390), (130, 169112), (208, 105695), (260, 84556), (520, 42278), (1040, 21139)]