20911360

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^2$

素因数の和:100

約数の個数: 108

約数和(自身を含む): 54801684

約数和(自身を除く): 33890324

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 32, 34, 40, 62, 64, 68, 80, 85, 124, 128, 136, 155, 160, 170, 248, 256, 272, 310, 320, 340, 496, 527, 544, 620, 640, 680, 961, 992, 1054, 1088, 1240, 1280, 1360, 1922, 1984, 2108, 2176, 2480, 2635, 2720, 3844, 3968, 4216, 4352, 4805, 4960, 5270, 5440, 7688, 7936, 8432, 9610, 9920, 10540, 10880, 15376, 16337, 16864, 19220, 19840, 21080, 21760, 30752, 32674, 33728, 38440, 39680, 42160, 61504, 65348, 67456, 76880, 81685, 84320, 123008, 130696, 134912, 153760, 163370, 168640, 246016, 261392, 307520, 326740, 337280, 522784, 615040, 653480, 674560, 1045568, 1230080, 1306960, 2091136, 2613920, 4182272, 5227840, 10455680, 20911360]

約数ペア:

[(1, 20911360), (2, 10455680), (4, 5227840), (5, 4182272), (8, 2613920), (10, 2091136), (16, 1306960), (17, 1230080), (20, 1045568), (31, 674560), (32, 653480), (34, 615040), (40, 522784), (62, 337280), (64, 326740), (68, 307520), (80, 261392), (85, 246016), (124, 168640), (128, 163370), (136, 153760), (155, 134912), (160, 130696), (170, 123008), (248, 84320), (256, 81685), (272, 76880), (310, 67456), (320, 65348), (340, 61504), (496, 42160), (527, 39680), (544, 38440), (620, 33728), (640, 32674), (680, 30752), (961, 21760), (992, 21080), (1054, 19840), (1088, 19220), (1240, 16864), (1280, 16337), (1360, 15376), (1922, 10880), (1984, 10540), (2108, 9920), (2176, 9610), (2480, 8432), (2635, 7936), (2720, 7688), (3844, 5440), (3968, 5270), (4216, 4960), (4352, 4805)]