21205400

素因数分解:

$2^3\times 5^2\times {\mathrm{229}}^1\times {\mathrm{463}}^1$

素因数の和:708

約数の個数: 48

約数和(自身を含む): 49624800

約数和(自身を除く): 28419400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 229, 458, 463, 916, 926, 1145, 1832, 1852, 2290, 2315, 3704, 4580, 4630, 5725, 9160, 9260, 11450, 11575, 18520, 22900, 23150, 45800, 46300, 92600, 106027, 212054, 424108, 530135, 848216, 1060270, 2120540, 2650675, 4241080, 5301350, 10602700, 21205400]

約数ペア:

[(1, 21205400), (2, 10602700), (4, 5301350), (5, 4241080), (8, 2650675), (10, 2120540), (20, 1060270), (25, 848216), (40, 530135), (50, 424108), (100, 212054), (200, 106027), (229, 92600), (458, 46300), (463, 45800), (916, 23150), (926, 22900), (1145, 18520), (1832, 11575), (1852, 11450), (2290, 9260), (2315, 9160), (3704, 5725), (4580, 4630)]