208901605

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{211}}^1\times {\mathrm{383}}^1$

素因数の和:657

約数の個数: 32

約数和(自身を含む): 281346048

約数和(自身を除く): 72444443

約数列:

[1, 5, 11, 47, 55, 211, 235, 383, 517, 1055, 1915, 2321, 2585, 4213, 9917, 11605, 18001, 21065, 49585, 80813, 90005, 109087, 198011, 404065, 545435, 888943, 990055, 3798211, 4444715, 18991055, 41780321, 208901605]

約数ペア:

[(1, 208901605), (5, 41780321), (11, 18991055), (47, 4444715), (55, 3798211), (211, 990055), (235, 888943), (383, 545435), (517, 404065), (1055, 198011), (1915, 109087), (2321, 90005), (2585, 80813), (4213, 49585), (9917, 21065), (11605, 18001)]