28266400

素因数分解:

$2^5\times 5^2\times {\mathrm{89}}^1\times {\mathrm{397}}^1$

素因数の和:506

約数の個数: 72

約数和(自身を含む): 69956460

約数和(自身を除く): 41690060

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 89, 100, 160, 178, 200, 356, 397, 400, 445, 712, 794, 800, 890, 1424, 1588, 1780, 1985, 2225, 2848, 3176, 3560, 3970, 4450, 6352, 7120, 7940, 8900, 9925, 12704, 14240, 15880, 17800, 19850, 31760, 35333, 35600, 39700, 63520, 70666, 71200, 79400, 141332, 158800, 176665, 282664, 317600, 353330, 565328, 706660, 883325, 1130656, 1413320, 1766650, 2826640, 3533300, 5653280, 7066600, 14133200, 28266400]

約数ペア:

[(1, 28266400), (2, 14133200), (4, 7066600), (5, 5653280), (8, 3533300), (10, 2826640), (16, 1766650), (20, 1413320), (25, 1130656), (32, 883325), (40, 706660), (50, 565328), (80, 353330), (89, 317600), (100, 282664), (160, 176665), (178, 158800), (200, 141332), (356, 79400), (397, 71200), (400, 70666), (445, 63520), (712, 39700), (794, 35600), (800, 35333), (890, 31760), (1424, 19850), (1588, 17800), (1780, 15880), (1985, 14240), (2225, 12704), (2848, 9925), (3176, 8900), (3560, 7940), (3970, 7120), (4450, 6352)]