21985480

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1723}}^1$

素因数の和:1774

約数の個数: 64

約数和(自身を含む): 55857600

約数和(自身を除く): 33872120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 1160, 1276, 1595, 1723, 2552, 3190, 3446, 6380, 6892, 8615, 12760, 13784, 17230, 18953, 34460, 37906, 49967, 68920, 75812, 94765, 99934, 151624, 189530, 199868, 249835, 379060, 399736, 499670, 549637, 758120, 999340, 1099274, 1998680, 2198548, 2748185, 4397096, 5496370, 10992740, 21985480]

約数ペア:

[(1, 21985480), (2, 10992740), (4, 5496370), (5, 4397096), (8, 2748185), (10, 2198548), (11, 1998680), (20, 1099274), (22, 999340), (29, 758120), (40, 549637), (44, 499670), (55, 399736), (58, 379060), (88, 249835), (110, 199868), (116, 189530), (145, 151624), (220, 99934), (232, 94765), (290, 75812), (319, 68920), (440, 49967), (580, 37906), (638, 34460), (1160, 18953), (1276, 17230), (1595, 13784), (1723, 12760), (2552, 8615), (3190, 6892), (3446, 6380)]