21556380

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{443}}^1\times {\mathrm{811}}^1$

素因数の和:1266

約数の個数: 48

約数和(自身を含む): 60568704

約数和(自身を除く): 39012324

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 443, 811, 886, 1329, 1622, 1772, 2215, 2433, 2658, 3244, 4055, 4430, 4866, 5316, 6645, 8110, 8860, 9732, 12165, 13290, 16220, 24330, 26580, 48660, 359273, 718546, 1077819, 1437092, 1796365, 2155638, 3592730, 4311276, 5389095, 7185460, 10778190, 21556380]

約数ペア:

[(1, 21556380), (2, 10778190), (3, 7185460), (4, 5389095), (5, 4311276), (6, 3592730), (10, 2155638), (12, 1796365), (15, 1437092), (20, 1077819), (30, 718546), (60, 359273), (443, 48660), (811, 26580), (886, 24330), (1329, 16220), (1622, 13290), (1772, 12165), (2215, 9732), (2433, 8860), (2658, 8110), (3244, 6645), (4055, 5316), (4430, 4866)]