21390500

素因数分解:

$2^2\times 5^3\times {\mathrm{179}}^1\times {\mathrm{239}}^1$

素因数の和:437

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 25783900

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 179, 239, 250, 358, 478, 500, 716, 895, 956, 1195, 1790, 2390, 3580, 4475, 4780, 5975, 8950, 11950, 17900, 22375, 23900, 29875, 42781, 44750, 59750, 85562, 89500, 119500, 171124, 213905, 427810, 855620, 1069525, 2139050, 4278100, 5347625, 10695250, 21390500]

約数ペア:

[(1, 21390500), (2, 10695250), (4, 5347625), (5, 4278100), (10, 2139050), (20, 1069525), (25, 855620), (50, 427810), (100, 213905), (125, 171124), (179, 119500), (239, 89500), (250, 85562), (358, 59750), (478, 44750), (500, 42781), (716, 29875), (895, 23900), (956, 22375), (1195, 17900), (1790, 11950), (2390, 8950), (3580, 5975), (4475, 4780)]