8405000

素因数分解:

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

素因数の和:108

約数の個数: 60

約数和(自身を含む): 20184945

約数和(自身を除く): 11779945

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 125, 164, 200, 205, 250, 328, 410, 500, 625, 820, 1000, 1025, 1250, 1640, 1681, 2050, 2500, 3362, 4100, 5000, 5125, 6724, 8200, 8405, 10250, 13448, 16810, 20500, 25625, 33620, 41000, 42025, 51250, 67240, 84050, 102500, 168100, 205000, 210125, 336200, 420250, 840500, 1050625, 1681000, 2101250, 4202500, 8405000]

約数ペア:

[(1, 8405000), (2, 4202500), (4, 2101250), (5, 1681000), (8, 1050625), (10, 840500), (20, 420250), (25, 336200), (40, 210125), (41, 205000), (50, 168100), (82, 102500), (100, 84050), (125, 67240), (164, 51250), (200, 42025), (205, 41000), (250, 33620), (328, 25625), (410, 20500), (500, 16810), (625, 13448), (820, 10250), (1000, 8405), (1025, 8200), (1250, 6724), (1640, 5125), (1681, 5000), (2050, 4100), (2500, 3362)]