21564720

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{491}}^1$

素因数の和:571

約数の個数: 120

約数和(自身を含む): 73758672

約数和(自身を除く): 52193952

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 61, 72, 80, 90, 120, 122, 144, 180, 183, 240, 244, 305, 360, 366, 488, 491, 549, 610, 720, 732, 915, 976, 982, 1098, 1220, 1464, 1473, 1830, 1964, 2196, 2440, 2455, 2745, 2928, 2946, 3660, 3928, 4392, 4419, 4880, 4910, 5490, 5892, 7320, 7365, 7856, 8784, 8838, 9820, 10980, 11784, 14640, 14730, 17676, 19640, 21960, 22095, 23568, 29460, 29951, 35352, 39280, 43920, 44190, 58920, 59902, 70704, 88380, 89853, 117840, 119804, 149755, 176760, 179706, 239608, 269559, 299510, 353520, 359412, 449265, 479216, 539118, 599020, 718824, 898530, 1078236, 1198040, 1347795, 1437648, 1797060, 2156472, 2396080, 2695590, 3594120, 4312944, 5391180, 7188240, 10782360, 21564720]

約数ペア:

[(1, 21564720), (2, 10782360), (3, 7188240), (4, 5391180), (5, 4312944), (6, 3594120), (8, 2695590), (9, 2396080), (10, 2156472), (12, 1797060), (15, 1437648), (16, 1347795), (18, 1198040), (20, 1078236), (24, 898530), (30, 718824), (36, 599020), (40, 539118), (45, 479216), (48, 449265), (60, 359412), (61, 353520), (72, 299510), (80, 269559), (90, 239608), (120, 179706), (122, 176760), (144, 149755), (180, 119804), (183, 117840), (240, 89853), (244, 88380), (305, 70704), (360, 59902), (366, 58920), (488, 44190), (491, 43920), (549, 39280), (610, 35352), (720, 29951), (732, 29460), (915, 23568), (976, 22095), (982, 21960), (1098, 19640), (1220, 17676), (1464, 14730), (1473, 14640), (1830, 11784), (1964, 10980), (2196, 9820), (2440, 8838), (2455, 8784), (2745, 7856), (2928, 7365), (2946, 7320), (3660, 5892), (3928, 5490), (4392, 4910), (4419, 4880)]