20499120

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{401}}^1$

素因数の和:491

約数の個数: 120

約数和(自身を含む): 69986592

約数和(自身を除く): 49487472

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 71, 72, 80, 90, 120, 142, 144, 180, 213, 240, 284, 355, 360, 401, 426, 568, 639, 710, 720, 802, 852, 1065, 1136, 1203, 1278, 1420, 1604, 1704, 2005, 2130, 2406, 2556, 2840, 3195, 3208, 3408, 3609, 4010, 4260, 4812, 5112, 5680, 6015, 6390, 6416, 7218, 8020, 8520, 9624, 10224, 12030, 12780, 14436, 16040, 17040, 18045, 19248, 24060, 25560, 28471, 28872, 32080, 36090, 48120, 51120, 56942, 57744, 72180, 85413, 96240, 113884, 142355, 144360, 170826, 227768, 256239, 284710, 288720, 341652, 427065, 455536, 512478, 569420, 683304, 854130, 1024956, 1138840, 1281195, 1366608, 1708260, 2049912, 2277680, 2562390, 3416520, 4099824, 5124780, 6833040, 10249560, 20499120]

約数ペア:

[(1, 20499120), (2, 10249560), (3, 6833040), (4, 5124780), (5, 4099824), (6, 3416520), (8, 2562390), (9, 2277680), (10, 2049912), (12, 1708260), (15, 1366608), (16, 1281195), (18, 1138840), (20, 1024956), (24, 854130), (30, 683304), (36, 569420), (40, 512478), (45, 455536), (48, 427065), (60, 341652), (71, 288720), (72, 284710), (80, 256239), (90, 227768), (120, 170826), (142, 144360), (144, 142355), (180, 113884), (213, 96240), (240, 85413), (284, 72180), (355, 57744), (360, 56942), (401, 51120), (426, 48120), (568, 36090), (639, 32080), (710, 28872), (720, 28471), (802, 25560), (852, 24060), (1065, 19248), (1136, 18045), (1203, 17040), (1278, 16040), (1420, 14436), (1604, 12780), (1704, 12030), (2005, 10224), (2130, 9624), (2406, 8520), (2556, 8020), (2840, 7218), (3195, 6416), (3208, 6390), (3408, 6015), (3609, 5680), (4010, 5112), (4260, 4812)]