20458400

素因数分解:

$2^5\times 5^2\times {\mathrm{107}}^1\times {\mathrm{239}}^1$

素因数の和:366

約数の個数: 72

約数和(自身を含む): 50621760

約数和(自身を除く): 30163360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 107, 160, 200, 214, 239, 400, 428, 478, 535, 800, 856, 956, 1070, 1195, 1712, 1912, 2140, 2390, 2675, 3424, 3824, 4280, 4780, 5350, 5975, 7648, 8560, 9560, 10700, 11950, 17120, 19120, 21400, 23900, 25573, 38240, 42800, 47800, 51146, 85600, 95600, 102292, 127865, 191200, 204584, 255730, 409168, 511460, 639325, 818336, 1022920, 1278650, 2045840, 2557300, 4091680, 5114600, 10229200, 20458400]

約数ペア:

[(1, 20458400), (2, 10229200), (4, 5114600), (5, 4091680), (8, 2557300), (10, 2045840), (16, 1278650), (20, 1022920), (25, 818336), (32, 639325), (40, 511460), (50, 409168), (80, 255730), (100, 204584), (107, 191200), (160, 127865), (200, 102292), (214, 95600), (239, 85600), (400, 51146), (428, 47800), (478, 42800), (535, 38240), (800, 25573), (856, 23900), (956, 21400), (1070, 19120), (1195, 17120), (1712, 11950), (1912, 10700), (2140, 9560), (2390, 8560), (2675, 7648), (3424, 5975), (3824, 5350), (4280, 4780)]