20472800

素因数分解:

$2^5\times 5^2\times {\mathrm{157}}^1\times {\mathrm{163}}^1$

素因数の和:340

約数の個数: 72

約数和(自身を含む): 50606136

約数和(自身を除く): 30133336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 157, 160, 163, 200, 314, 326, 400, 628, 652, 785, 800, 815, 1256, 1304, 1570, 1630, 2512, 2608, 3140, 3260, 3925, 4075, 5024, 5216, 6280, 6520, 7850, 8150, 12560, 13040, 15700, 16300, 25120, 25591, 26080, 31400, 32600, 51182, 62800, 65200, 102364, 125600, 127955, 130400, 204728, 255910, 409456, 511820, 639775, 818912, 1023640, 1279550, 2047280, 2559100, 4094560, 5118200, 10236400, 20472800]

約数ペア:

[(1, 20472800), (2, 10236400), (4, 5118200), (5, 4094560), (8, 2559100), (10, 2047280), (16, 1279550), (20, 1023640), (25, 818912), (32, 639775), (40, 511820), (50, 409456), (80, 255910), (100, 204728), (157, 130400), (160, 127955), (163, 125600), (200, 102364), (314, 65200), (326, 62800), (400, 51182), (628, 32600), (652, 31400), (785, 26080), (800, 25591), (815, 25120), (1256, 16300), (1304, 15700), (1570, 13040), (1630, 12560), (2512, 8150), (2608, 7850), (3140, 6520), (3260, 6280), (3925, 5216), (4075, 5024)]