81845600

素因数分解:

$2^5\times 5^2\times {\mathrm{263}}^1\times {\mathrm{389}}^1$

素因数の和:672

約数の個数: 72

約数和(自身を含む): 201080880

約数和(自身を除く): 119235280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 263, 389, 400, 526, 778, 800, 1052, 1315, 1556, 1945, 2104, 2630, 3112, 3890, 4208, 5260, 6224, 6575, 7780, 8416, 9725, 10520, 12448, 13150, 15560, 19450, 21040, 26300, 31120, 38900, 42080, 52600, 62240, 77800, 102307, 105200, 155600, 204614, 210400, 311200, 409228, 511535, 818456, 1023070, 1636912, 2046140, 2557675, 3273824, 4092280, 5115350, 8184560, 10230700, 16369120, 20461400, 40922800, 81845600]

約数ペア:

[(1, 81845600), (2, 40922800), (4, 20461400), (5, 16369120), (8, 10230700), (10, 8184560), (16, 5115350), (20, 4092280), (25, 3273824), (32, 2557675), (40, 2046140), (50, 1636912), (80, 1023070), (100, 818456), (160, 511535), (200, 409228), (263, 311200), (389, 210400), (400, 204614), (526, 155600), (778, 105200), (800, 102307), (1052, 77800), (1315, 62240), (1556, 52600), (1945, 42080), (2104, 38900), (2630, 31120), (3112, 26300), (3890, 21040), (4208, 19450), (5260, 15560), (6224, 13150), (6575, 12448), (7780, 10520), (8416, 9725)]