640224720

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1811}}^1$

素因数の和:2321

約数の個数: 120

約数和(自身を含む): 2155656672

約数和(自身を除く): 1515431952

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 491, 720, 982, 1473, 1811, 1964, 2455, 2946, 3622, 3928, 4419, 4910, 5433, 5892, 7244, 7365, 7856, 8838, 9055, 9820, 10866, 11784, 14488, 14730, 16299, 17676, 18110, 19640, 21732, 22095, 23568, 27165, 28976, 29460, 32598, 35352, 36220, 39280, 43464, 44190, 54330, 58920, 65196, 70704, 72440, 81495, 86928, 88380, 108660, 117840, 130392, 144880, 162990, 176760, 217320, 260784, 325980, 353520, 434640, 651960, 889201, 1303920, 1778402, 2667603, 3556804, 4446005, 5335206, 7113608, 8002809, 8892010, 10670412, 13338015, 14227216, 16005618, 17784020, 21340824, 26676030, 32011236, 35568040, 40014045, 42681648, 53352060, 64022472, 71136080, 80028090, 106704120, 128044944, 160056180, 213408240, 320112360, 640224720]

約数ペア:

[(1, 640224720), (2, 320112360), (3, 213408240), (4, 160056180), (5, 128044944), (6, 106704120), (8, 80028090), (9, 71136080), (10, 64022472), (12, 53352060), (15, 42681648), (16, 40014045), (18, 35568040), (20, 32011236), (24, 26676030), (30, 21340824), (36, 17784020), (40, 16005618), (45, 14227216), (48, 13338015), (60, 10670412), (72, 8892010), (80, 8002809), (90, 7113608), (120, 5335206), (144, 4446005), (180, 3556804), (240, 2667603), (360, 1778402), (491, 1303920), (720, 889201), (982, 651960), (1473, 434640), (1811, 353520), (1964, 325980), (2455, 260784), (2946, 217320), (3622, 176760), (3928, 162990), (4419, 144880), (4910, 130392), (5433, 117840), (5892, 108660), (7244, 88380), (7365, 86928), (7856, 81495), (8838, 72440), (9055, 70704), (9820, 65196), (10866, 58920), (11784, 54330), (14488, 44190), (14730, 43464), (16299, 39280), (17676, 36220), (18110, 35352), (19640, 32598), (21732, 29460), (22095, 28976), (23568, 27165)]