20814801.000000000

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{997}}^1$

素因数の和:1195

約数の個数: 120

約数和(自身を含む): 434369520

約数和(自身を除く): 305876160

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, 179, 180, 240, 358, 360, 537, 716, 720, 895, 997, 1074, 1432, 1611, 1790, 1994, 2148, 2685, 2864, 2991, 3222, 3580, 3988, 4296, 4985, 5370, 5982, 6444, 7160, 7976, 8055, 8592, 8973, 9970, 10740, 11964, 12888, 14320, 14955, 15952, 16110, 17946, 19940, 21480, 23928, 25776, 29910, 32220, 35892, 39880, 42960, 44865, 47856, 59820, 64440, 71784, 79760, 89730, 119640, 128880, 143568, 178463, 179460, 239280, 356926, 358920, 535389, 713852, 717840, 892315, 1070778, 1427704, 1606167, 1784630, 2141556, 2676945, 2855408, 3212334, 3569260, 4283112, 5353890, 6424668, 7138520, 8030835, 8566224, 10707780, 12849336, 14277040, 16061670, 21415560, 25698672, 32123340, 42831120, 64246680, 128493360]

約数ペア:

[(1, 128493360), (2, 64246680), (3, 42831120), (4, 32123340), (5, 25698672), (6, 21415560), (8, 16061670), (9, 14277040), (10, 12849336), (12, 10707780), (15, 8566224), (16, 8030835), (18, 7138520), (20, 6424668), (24, 5353890), (30, 4283112), (36, 3569260), (40, 3212334), (45, 2855408), (48, 2676945), (60, 2141556), (72, 1784630), (80, 1606167), (90, 1427704), (120, 1070778), (144, 892315), (179, 717840), (180, 713852), (240, 535389), (358, 358920), (360, 356926), (537, 239280), (716, 179460), (720, 178463), (895, 143568), (997, 128880), (1074, 119640), (1432, 89730), (1611, 79760), (1790, 71784), (1994, 64440), (2148, 59820), (2685, 47856), (2864, 44865), (2991, 42960), (3222, 39880), (3580, 35892), (3988, 32220), (4296, 29910), (4985, 25776), (5370, 23928), (5982, 21480), (6444, 19940), (7160, 17946), (7976, 16110), (8055, 15952), (8592, 14955), (8973, 14320), (9970, 12888), (10740, 11964)]