1270400

素因数分解:

$2^7\times 5^2\times {\mathrm{397}}^1$

素因数の和:421

約数の個数: 48

約数和(自身を含む): 3146190

約数和(自身を除く): 1875790

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 320, 397, 400, 640, 794, 800, 1588, 1600, 1985, 3176, 3200, 3970, 6352, 7940, 9925, 12704, 15880, 19850, 25408, 31760, 39700, 50816, 63520, 79400, 127040, 158800, 254080, 317600, 635200, 1270400]

約数ペア:

[(1, 1270400), (2, 635200), (4, 317600), (5, 254080), (8, 158800), (10, 127040), (16, 79400), (20, 63520), (25, 50816), (32, 39700), (40, 31760), (50, 25408), (64, 19850), (80, 15880), (100, 12704), (128, 9925), (160, 7940), (200, 6352), (320, 3970), (397, 3200), (400, 3176), (640, 1985), (794, 1600), (800, 1588)]