20597500

素因数分解:

$2^2\times 5^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1$

素因数の和:149

約数の個数: 120

約数和(自身を含む): 56681856

約数和(自身を除く): 36084356

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 44, 50, 55, 70, 77, 100, 107, 110, 125, 140, 154, 175, 214, 220, 250, 275, 308, 350, 385, 428, 500, 535, 550, 625, 700, 749, 770, 875, 1070, 1100, 1177, 1250, 1375, 1498, 1540, 1750, 1925, 2140, 2354, 2500, 2675, 2750, 2996, 3500, 3745, 3850, 4375, 4708, 5350, 5500, 5885, 6875, 7490, 7700, 8239, 8750, 9625, 10700, 11770, 13375, 13750, 14980, 16478, 17500, 18725, 19250, 23540, 26750, 27500, 29425, 32956, 37450, 38500, 41195, 48125, 53500, 58850, 66875, 74900, 82390, 93625, 96250, 117700, 133750, 147125, 164780, 187250, 192500, 205975, 267500, 294250, 374500, 411950, 468125, 588500, 735625, 823900, 936250, 1029875, 1471250, 1872500, 2059750, 2942500, 4119500, 5149375, 10298750, 20597500]

約数ペア:

[(1, 20597500), (2, 10298750), (4, 5149375), (5, 4119500), (7, 2942500), (10, 2059750), (11, 1872500), (14, 1471250), (20, 1029875), (22, 936250), (25, 823900), (28, 735625), (35, 588500), (44, 468125), (50, 411950), (55, 374500), (70, 294250), (77, 267500), (100, 205975), (107, 192500), (110, 187250), (125, 164780), (140, 147125), (154, 133750), (175, 117700), (214, 96250), (220, 93625), (250, 82390), (275, 74900), (308, 66875), (350, 58850), (385, 53500), (428, 48125), (500, 41195), (535, 38500), (550, 37450), (625, 32956), (700, 29425), (749, 27500), (770, 26750), (875, 23540), (1070, 19250), (1100, 18725), (1177, 17500), (1250, 16478), (1375, 14980), (1498, 13750), (1540, 13375), (1750, 11770), (1925, 10700), (2140, 9625), (2354, 8750), (2500, 8239), (2675, 7700), (2750, 7490), (2996, 6875), (3500, 5885), (3745, 5500), (3850, 5350), (4375, 4708)]