21115000

素因数分解:

$2^3\times 5^4\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:170

約数の個数: 80

約数和(自身を含む): 51171120

約数和(自身を除く): 30056120

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 103, 125, 164, 200, 205, 206, 250, 328, 410, 412, 500, 515, 625, 820, 824, 1000, 1025, 1030, 1250, 1640, 2050, 2060, 2500, 2575, 4100, 4120, 4223, 5000, 5125, 5150, 8200, 8446, 10250, 10300, 12875, 16892, 20500, 20600, 21115, 25625, 25750, 33784, 41000, 42230, 51250, 51500, 64375, 84460, 102500, 103000, 105575, 128750, 168920, 205000, 211150, 257500, 422300, 515000, 527875, 844600, 1055750, 2111500, 2639375, 4223000, 5278750, 10557500, 21115000]

約数ペア:

[(1, 21115000), (2, 10557500), (4, 5278750), (5, 4223000), (8, 2639375), (10, 2111500), (20, 1055750), (25, 844600), (40, 527875), (41, 515000), (50, 422300), (82, 257500), (100, 211150), (103, 205000), (125, 168920), (164, 128750), (200, 105575), (205, 103000), (206, 102500), (250, 84460), (328, 64375), (410, 51500), (412, 51250), (500, 42230), (515, 41000), (625, 33784), (820, 25750), (824, 25625), (1000, 21115), (1025, 20600), (1030, 20500), (1250, 16892), (1640, 12875), (2050, 10300), (2060, 10250), (2500, 8446), (2575, 8200), (4100, 5150), (4120, 5125), (4223, 5000)]