20590000

素因数分解:

$2^4\times 5^4\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:128

約数の個数: 100

約数和(自身を含む): 52295760

約数和(自身を除く): 31705760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 29, 40, 50, 58, 71, 80, 100, 116, 125, 142, 145, 200, 232, 250, 284, 290, 355, 400, 464, 500, 568, 580, 625, 710, 725, 1000, 1136, 1160, 1250, 1420, 1450, 1775, 2000, 2059, 2320, 2500, 2840, 2900, 3550, 3625, 4118, 5000, 5680, 5800, 7100, 7250, 8236, 8875, 10000, 10295, 11600, 14200, 14500, 16472, 17750, 18125, 20590, 28400, 29000, 32944, 35500, 36250, 41180, 44375, 51475, 58000, 71000, 72500, 82360, 88750, 102950, 142000, 145000, 164720, 177500, 205900, 257375, 290000, 355000, 411800, 514750, 710000, 823600, 1029500, 1286875, 2059000, 2573750, 4118000, 5147500, 10295000, 20590000]

約数ペア:

[(1, 20590000), (2, 10295000), (4, 5147500), (5, 4118000), (8, 2573750), (10, 2059000), (16, 1286875), (20, 1029500), (25, 823600), (29, 710000), (40, 514750), (50, 411800), (58, 355000), (71, 290000), (80, 257375), (100, 205900), (116, 177500), (125, 164720), (142, 145000), (145, 142000), (200, 102950), (232, 88750), (250, 82360), (284, 72500), (290, 71000), (355, 58000), (400, 51475), (464, 44375), (500, 41180), (568, 36250), (580, 35500), (625, 32944), (710, 29000), (725, 28400), (1000, 20590), (1136, 18125), (1160, 17750), (1250, 16472), (1420, 14500), (1450, 14200), (1775, 11600), (2000, 10295), (2059, 10000), (2320, 8875), (2500, 8236), (2840, 7250), (2900, 7100), (3550, 5800), (3625, 5680), (4118, 5000)]