21389000

素因数分解:

$2^3\times 5^3\times {\mathrm{73}}^1\times {\mathrm{293}}^1$

素因数の和:387

約数の個数: 64

約数和(自身を含む): 50909040

約数和(自身を除く): 29520040

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 73, 100, 125, 146, 200, 250, 292, 293, 365, 500, 584, 586, 730, 1000, 1172, 1460, 1465, 1825, 2344, 2920, 2930, 3650, 5860, 7300, 7325, 9125, 11720, 14600, 14650, 18250, 21389, 29300, 36500, 36625, 42778, 58600, 73000, 73250, 85556, 106945, 146500, 171112, 213890, 293000, 427780, 534725, 855560, 1069450, 2138900, 2673625, 4277800, 5347250, 10694500, 21389000]

約数ペア:

[(1, 21389000), (2, 10694500), (4, 5347250), (5, 4277800), (8, 2673625), (10, 2138900), (20, 1069450), (25, 855560), (40, 534725), (50, 427780), (73, 293000), (100, 213890), (125, 171112), (146, 146500), (200, 106945), (250, 85556), (292, 73250), (293, 73000), (365, 58600), (500, 42778), (584, 36625), (586, 36500), (730, 29300), (1000, 21389), (1172, 18250), (1460, 14650), (1465, 14600), (1825, 11720), (2344, 9125), (2920, 7325), (2930, 7300), (3650, 5860)]