18245000

素因数分解:

$2^3\times 5^4\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:156

約数の個数: 80

約数和(自身を含む): 44282700

約数和(自身を除く): 26037700

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 89, 100, 125, 164, 178, 200, 205, 250, 328, 356, 410, 445, 500, 625, 712, 820, 890, 1000, 1025, 1250, 1640, 1780, 2050, 2225, 2500, 3560, 3649, 4100, 4450, 5000, 5125, 7298, 8200, 8900, 10250, 11125, 14596, 17800, 18245, 20500, 22250, 25625, 29192, 36490, 41000, 44500, 51250, 55625, 72980, 89000, 91225, 102500, 111250, 145960, 182450, 205000, 222500, 364900, 445000, 456125, 729800, 912250, 1824500, 2280625, 3649000, 4561250, 9122500, 18245000]

約数ペア:

[(1, 18245000), (2, 9122500), (4, 4561250), (5, 3649000), (8, 2280625), (10, 1824500), (20, 912250), (25, 729800), (40, 456125), (41, 445000), (50, 364900), (82, 222500), (89, 205000), (100, 182450), (125, 145960), (164, 111250), (178, 102500), (200, 91225), (205, 89000), (250, 72980), (328, 55625), (356, 51250), (410, 44500), (445, 41000), (500, 36490), (625, 29192), (712, 25625), (820, 22250), (890, 20500), (1000, 18245), (1025, 17800), (1250, 14596), (1640, 11125), (1780, 10250), (2050, 8900), (2225, 8200), (2500, 7298), (3560, 5125), (3649, 5000), (4100, 4450)]