20758400

素因数分解:

$2^7\times 5^2\times {\mathrm{13}}^1\times {\mathrm{499}}^1$

素因数の和:536

約数の個数: 96

約数和(自身を含む): 55335000

約数和(自身を除く): 34576600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 128, 130, 160, 200, 208, 260, 320, 325, 400, 416, 499, 520, 640, 650, 800, 832, 998, 1040, 1300, 1600, 1664, 1996, 2080, 2495, 2600, 3200, 3992, 4160, 4990, 5200, 6487, 7984, 8320, 9980, 10400, 12475, 12974, 15968, 19960, 20800, 24950, 25948, 31936, 32435, 39920, 41600, 49900, 51896, 63872, 64870, 79840, 99800, 103792, 129740, 159680, 162175, 199600, 207584, 259480, 319360, 324350, 399200, 415168, 518960, 648700, 798400, 830336, 1037920, 1297400, 1596800, 2075840, 2594800, 4151680, 5189600, 10379200, 20758400]

約数ペア:

[(1, 20758400), (2, 10379200), (4, 5189600), (5, 4151680), (8, 2594800), (10, 2075840), (13, 1596800), (16, 1297400), (20, 1037920), (25, 830336), (26, 798400), (32, 648700), (40, 518960), (50, 415168), (52, 399200), (64, 324350), (65, 319360), (80, 259480), (100, 207584), (104, 199600), (128, 162175), (130, 159680), (160, 129740), (200, 103792), (208, 99800), (260, 79840), (320, 64870), (325, 63872), (400, 51896), (416, 49900), (499, 41600), (520, 39920), (640, 32435), (650, 31936), (800, 25948), (832, 24950), (998, 20800), (1040, 19960), (1300, 15968), (1600, 12974), (1664, 12475), (1996, 10400), (2080, 9980), (2495, 8320), (2600, 7984), (3200, 6487), (3992, 5200), (4160, 4990)]