28538240

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:140

約数の個数: 128

約数和(自身を含む): 75129120

約数和(自身を除く): 46590880

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 43, 61, 64, 68, 80, 85, 86, 122, 128, 136, 160, 170, 172, 215, 244, 272, 305, 320, 340, 344, 430, 488, 544, 610, 640, 680, 688, 731, 860, 976, 1037, 1088, 1220, 1360, 1376, 1462, 1720, 1952, 2074, 2176, 2440, 2623, 2720, 2752, 2924, 3440, 3655, 3904, 4148, 4880, 5185, 5246, 5440, 5504, 5848, 6880, 7310, 7808, 8296, 9760, 10370, 10492, 10880, 11696, 13115, 13760, 14620, 16592, 19520, 20740, 20984, 23392, 26230, 27520, 29240, 33184, 39040, 41480, 41968, 44591, 46784, 52460, 58480, 66368, 82960, 83936, 89182, 93568, 104920, 116960, 132736, 165920, 167872, 178364, 209840, 222955, 233920, 331840, 335744, 356728, 419680, 445910, 467840, 663680, 713456, 839360, 891820, 1426912, 1678720, 1783640, 2853824, 3567280, 5707648, 7134560, 14269120, 28538240]

約数ペア:

[(1, 28538240), (2, 14269120), (4, 7134560), (5, 5707648), (8, 3567280), (10, 2853824), (16, 1783640), (17, 1678720), (20, 1426912), (32, 891820), (34, 839360), (40, 713456), (43, 663680), (61, 467840), (64, 445910), (68, 419680), (80, 356728), (85, 335744), (86, 331840), (122, 233920), (128, 222955), (136, 209840), (160, 178364), (170, 167872), (172, 165920), (215, 132736), (244, 116960), (272, 104920), (305, 93568), (320, 89182), (340, 83936), (344, 82960), (430, 66368), (488, 58480), (544, 52460), (610, 46784), (640, 44591), (680, 41968), (688, 41480), (731, 39040), (860, 33184), (976, 29240), (1037, 27520), (1088, 26230), (1220, 23392), (1360, 20984), (1376, 20740), (1462, 19520), (1720, 16592), (1952, 14620), (2074, 13760), (2176, 13115), (2440, 11696), (2623, 10880), (2720, 10492), (2752, 10370), (2924, 9760), (3440, 8296), (3655, 7808), (3904, 7310), (4148, 6880), (4880, 5848), (5185, 5504), (5246, 5440)]