20887920

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{433}}^1$

素因数の和:519

約数の個数: 120

約数和(自身を含む): 71360016

約数和(自身を除く): 50472096

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 67, 72, 80, 90, 120, 134, 144, 180, 201, 240, 268, 335, 360, 402, 433, 536, 603, 670, 720, 804, 866, 1005, 1072, 1206, 1299, 1340, 1608, 1732, 2010, 2165, 2412, 2598, 2680, 3015, 3216, 3464, 3897, 4020, 4330, 4824, 5196, 5360, 6030, 6495, 6928, 7794, 8040, 8660, 9648, 10392, 12060, 12990, 15588, 16080, 17320, 19485, 20784, 24120, 25980, 29011, 31176, 34640, 38970, 48240, 51960, 58022, 62352, 77940, 87033, 103920, 116044, 145055, 155880, 174066, 232088, 261099, 290110, 311760, 348132, 435165, 464176, 522198, 580220, 696264, 870330, 1044396, 1160440, 1305495, 1392528, 1740660, 2088792, 2320880, 2610990, 3481320, 4177584, 5221980, 6962640, 10443960, 20887920]

約数ペア:

[(1, 20887920), (2, 10443960), (3, 6962640), (4, 5221980), (5, 4177584), (6, 3481320), (8, 2610990), (9, 2320880), (10, 2088792), (12, 1740660), (15, 1392528), (16, 1305495), (18, 1160440), (20, 1044396), (24, 870330), (30, 696264), (36, 580220), (40, 522198), (45, 464176), (48, 435165), (60, 348132), (67, 311760), (72, 290110), (80, 261099), (90, 232088), (120, 174066), (134, 155880), (144, 145055), (180, 116044), (201, 103920), (240, 87033), (268, 77940), (335, 62352), (360, 58022), (402, 51960), (433, 48240), (536, 38970), (603, 34640), (670, 31176), (720, 29011), (804, 25980), (866, 24120), (1005, 20784), (1072, 19485), (1206, 17320), (1299, 16080), (1340, 15588), (1608, 12990), (1732, 12060), (2010, 10392), (2165, 9648), (2412, 8660), (2598, 8040), (2680, 7794), (3015, 6928), (3216, 6495), (3464, 6030), (3897, 5360), (4020, 5196), (4330, 4824)]