21278300

素因数分解:

$2^2\times 5^2\times {\mathrm{389}}^1\times {\mathrm{547}}^1$

素因数の和:950

約数の個数: 36

約数和(自身を含む): 46377240

約数和(自身を除く): 25098940

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 389, 547, 778, 1094, 1556, 1945, 2188, 2735, 3890, 5470, 7780, 9725, 10940, 13675, 19450, 27350, 38900, 54700, 212783, 425566, 851132, 1063915, 2127830, 4255660, 5319575, 10639150, 21278300]

約数ペア:

[(1, 21278300), (2, 10639150), (4, 5319575), (5, 4255660), (10, 2127830), (20, 1063915), (25, 851132), (50, 425566), (100, 212783), (389, 54700), (547, 38900), (778, 27350), (1094, 19450), (1556, 13675), (1945, 10940), (2188, 9725), (2735, 7780), (3890, 5470)]