20649840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{619}}^1$

素因数の和:774

約数の個数: 80

約数和(自身を含む): 64579200

約数和(自身を除く): 43929360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 139, 240, 278, 417, 556, 619, 695, 834, 1112, 1238, 1390, 1668, 1857, 2085, 2224, 2476, 2780, 3095, 3336, 3714, 4170, 4952, 5560, 6190, 6672, 7428, 8340, 9285, 9904, 11120, 12380, 14856, 16680, 18570, 24760, 29712, 33360, 37140, 49520, 74280, 86041, 148560, 172082, 258123, 344164, 430205, 516246, 688328, 860410, 1032492, 1290615, 1376656, 1720820, 2064984, 2581230, 3441640, 4129968, 5162460, 6883280, 10324920, 20649840]

約数ペア:

[(1, 20649840), (2, 10324920), (3, 6883280), (4, 5162460), (5, 4129968), (6, 3441640), (8, 2581230), (10, 2064984), (12, 1720820), (15, 1376656), (16, 1290615), (20, 1032492), (24, 860410), (30, 688328), (40, 516246), (48, 430205), (60, 344164), (80, 258123), (120, 172082), (139, 148560), (240, 86041), (278, 74280), (417, 49520), (556, 37140), (619, 33360), (695, 29712), (834, 24760), (1112, 18570), (1238, 16680), (1390, 14856), (1668, 12380), (1857, 11120), (2085, 9904), (2224, 9285), (2476, 8340), (2780, 7428), (3095, 6672), (3336, 6190), (3714, 5560), (4170, 4952)]