21157600

素因数分解:

$2^5\times 5^2\times {\mathrm{53}}^1\times {\mathrm{499}}^1$

素因数の和:572

約数の個数: 72

約数和(自身を含む): 52731000

約数和(自身を除く): 31573400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 53, 80, 100, 106, 160, 200, 212, 265, 400, 424, 499, 530, 800, 848, 998, 1060, 1325, 1696, 1996, 2120, 2495, 2650, 3992, 4240, 4990, 5300, 7984, 8480, 9980, 10600, 12475, 15968, 19960, 21200, 24950, 26447, 39920, 42400, 49900, 52894, 79840, 99800, 105788, 132235, 199600, 211576, 264470, 399200, 423152, 528940, 661175, 846304, 1057880, 1322350, 2115760, 2644700, 4231520, 5289400, 10578800, 21157600]

約数ペア:

[(1, 21157600), (2, 10578800), (4, 5289400), (5, 4231520), (8, 2644700), (10, 2115760), (16, 1322350), (20, 1057880), (25, 846304), (32, 661175), (40, 528940), (50, 423152), (53, 399200), (80, 264470), (100, 211576), (106, 199600), (160, 132235), (200, 105788), (212, 99800), (265, 79840), (400, 52894), (424, 49900), (499, 42400), (530, 39920), (800, 26447), (848, 24950), (998, 21200), (1060, 19960), (1325, 15968), (1696, 12475), (1996, 10600), (2120, 9980), (2495, 8480), (2650, 7984), (3992, 5300), (4240, 4990)]