20881120

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{10039}}^1$

素因数の和:10067

約数の個数: 48

約数和(自身を含む): 53131680

約数和(自身を除く): 32250560

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 10039, 20078, 40156, 50195, 80312, 100390, 130507, 160624, 200780, 261014, 321248, 401560, 522028, 652535, 803120, 1044056, 1305070, 1606240, 2088112, 2610140, 4176224, 5220280, 10440560, 20881120]

約数ペア:

[(1, 20881120), (2, 10440560), (4, 5220280), (5, 4176224), (8, 2610140), (10, 2088112), (13, 1606240), (16, 1305070), (20, 1044056), (26, 803120), (32, 652535), (40, 522028), (52, 401560), (65, 321248), (80, 261014), (104, 200780), (130, 160624), (160, 130507), (208, 100390), (260, 80312), (416, 50195), (520, 40156), (1040, 20078), (2080, 10039)]