81419240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{271}}^1$

素因数の和:355

約数の個数: 128

約数和(自身を含む): 223257600

約数和(自身を除く): 141838360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 37, 40, 56, 58, 70, 74, 116, 140, 145, 148, 185, 203, 232, 259, 271, 280, 290, 296, 370, 406, 518, 542, 580, 740, 812, 1015, 1036, 1073, 1084, 1160, 1295, 1355, 1480, 1624, 1897, 2030, 2072, 2146, 2168, 2590, 2710, 3794, 4060, 4292, 5180, 5365, 5420, 7511, 7588, 7859, 8120, 8584, 9485, 10027, 10360, 10730, 10840, 15022, 15176, 15718, 18970, 20054, 21460, 30044, 31436, 37555, 37940, 39295, 40108, 42920, 50135, 55013, 60088, 62872, 70189, 75110, 75880, 78590, 80216, 100270, 110026, 140378, 150220, 157180, 200540, 220052, 275065, 280756, 290783, 300440, 314360, 350945, 401080, 440104, 550130, 561512, 581566, 701890, 1100260, 1163132, 1403780, 1453915, 2035481, 2200520, 2326264, 2807560, 2907830, 4070962, 5815660, 8141924, 10177405, 11631320, 16283848, 20354810, 40709620, 81419240]

約数ペア:

[(1, 81419240), (2, 40709620), (4, 20354810), (5, 16283848), (7, 11631320), (8, 10177405), (10, 8141924), (14, 5815660), (20, 4070962), (28, 2907830), (29, 2807560), (35, 2326264), (37, 2200520), (40, 2035481), (56, 1453915), (58, 1403780), (70, 1163132), (74, 1100260), (116, 701890), (140, 581566), (145, 561512), (148, 550130), (185, 440104), (203, 401080), (232, 350945), (259, 314360), (271, 300440), (280, 290783), (290, 280756), (296, 275065), (370, 220052), (406, 200540), (518, 157180), (542, 150220), (580, 140378), (740, 110026), (812, 100270), (1015, 80216), (1036, 78590), (1073, 75880), (1084, 75110), (1160, 70189), (1295, 62872), (1355, 60088), (1480, 55013), (1624, 50135), (1897, 42920), (2030, 40108), (2072, 39295), (2146, 37940), (2168, 37555), (2590, 31436), (2710, 30044), (3794, 21460), (4060, 20054), (4292, 18970), (5180, 15718), (5365, 15176), (5420, 15022), (7511, 10840), (7588, 10730), (7859, 10360), (8120, 10027), (8584, 9485)]