20360000

素因数分解:

$2^6\times 5^4\times {\mathrm{509}}^1$

素因数の和:541

約数の個数: 70

約数和(自身を含む): 50585370

約数和(自身を除く): 30225370

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 509, 625, 800, 1000, 1018, 1250, 1600, 2000, 2036, 2500, 2545, 4000, 4072, 5000, 5090, 8000, 8144, 10000, 10180, 12725, 16288, 20000, 20360, 25450, 32576, 40000, 40720, 50900, 63625, 81440, 101800, 127250, 162880, 203600, 254500, 318125, 407200, 509000, 636250, 814400, 1018000, 1272500, 2036000, 2545000, 4072000, 5090000, 10180000, 20360000]

約数ペア:

[(1, 20360000), (2, 10180000), (4, 5090000), (5, 4072000), (8, 2545000), (10, 2036000), (16, 1272500), (20, 1018000), (25, 814400), (32, 636250), (40, 509000), (50, 407200), (64, 318125), (80, 254500), (100, 203600), (125, 162880), (160, 127250), (200, 101800), (250, 81440), (320, 63625), (400, 50900), (500, 40720), (509, 40000), (625, 32576), (800, 25450), (1000, 20360), (1018, 20000), (1250, 16288), (1600, 12725), (2000, 10180), (2036, 10000), (2500, 8144), (2545, 8000), (4000, 5090), (4072, 5000)]