21475700

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:249

約数の個数: 72

約数和(自身を含む): 49996800

約数和(自身を除く): 28521100

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 89, 95, 100, 127, 178, 190, 254, 356, 380, 445, 475, 508, 635, 890, 950, 1270, 1691, 1780, 1900, 2225, 2413, 2540, 3175, 3382, 4450, 4826, 6350, 6764, 8455, 8900, 9652, 11303, 12065, 12700, 16910, 22606, 24130, 33820, 42275, 45212, 48260, 56515, 60325, 84550, 113030, 120650, 169100, 214757, 226060, 241300, 282575, 429514, 565150, 859028, 1073785, 1130300, 2147570, 4295140, 5368925, 10737850, 21475700]

約数ペア:

[(1, 21475700), (2, 10737850), (4, 5368925), (5, 4295140), (10, 2147570), (19, 1130300), (20, 1073785), (25, 859028), (38, 565150), (50, 429514), (76, 282575), (89, 241300), (95, 226060), (100, 214757), (127, 169100), (178, 120650), (190, 113030), (254, 84550), (356, 60325), (380, 56515), (445, 48260), (475, 45212), (508, 42275), (635, 33820), (890, 24130), (950, 22606), (1270, 16910), (1691, 12700), (1780, 12065), (1900, 11303), (2225, 9652), (2413, 8900), (2540, 8455), (3175, 6764), (3382, 6350), (4450, 4826)]