20123800

素因数分解:

$2^3\times 5^2\times {\mathrm{239}}^1\times {\mathrm{421}}^1$

素因数の和:676

約数の個数: 48

約数和(自身を含む): 47095200

約数和(自身を除く): 26971400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 239, 421, 478, 842, 956, 1195, 1684, 1912, 2105, 2390, 3368, 4210, 4780, 5975, 8420, 9560, 10525, 11950, 16840, 21050, 23900, 42100, 47800, 84200, 100619, 201238, 402476, 503095, 804952, 1006190, 2012380, 2515475, 4024760, 5030950, 10061900, 20123800]

約数ペア:

[(1, 20123800), (2, 10061900), (4, 5030950), (5, 4024760), (8, 2515475), (10, 2012380), (20, 1006190), (25, 804952), (40, 503095), (50, 402476), (100, 201238), (200, 100619), (239, 84200), (421, 47800), (478, 42100), (842, 23900), (956, 21050), (1195, 16840), (1684, 11950), (1912, 10525), (2105, 9560), (2390, 8420), (3368, 5975), (4210, 4780)]