21111800

素因数分解:

$2^3\times 5^2\times {\mathrm{283}}^1\times {\mathrm{373}}^1$

素因数の和:672

約数の個数: 48

約数和(自身を含む): 49390440

約数和(自身を除く): 28278640

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 283, 373, 566, 746, 1132, 1415, 1492, 1865, 2264, 2830, 2984, 3730, 5660, 7075, 7460, 9325, 11320, 14150, 14920, 18650, 28300, 37300, 56600, 74600, 105559, 211118, 422236, 527795, 844472, 1055590, 2111180, 2638975, 4222360, 5277950, 10555900, 21111800]

約数ペア:

[(1, 21111800), (2, 10555900), (4, 5277950), (5, 4222360), (8, 2638975), (10, 2111180), (20, 1055590), (25, 844472), (40, 527795), (50, 422236), (100, 211118), (200, 105559), (283, 74600), (373, 56600), (566, 37300), (746, 28300), (1132, 18650), (1415, 14920), (1492, 14150), (1865, 11320), (2264, 9325), (2830, 7460), (2984, 7075), (3730, 5660)]