20326400

素因数分解:

$2^{11}\times 5^2\times {\mathrm{397}}^1$

素因数の和:429

約数の個数: 72

約数和(自身を含む): 50524110

約数和(自身を除く): 30197710

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 397, 400, 512, 640, 794, 800, 1024, 1280, 1588, 1600, 1985, 2048, 2560, 3176, 3200, 3970, 5120, 6352, 6400, 7940, 9925, 10240, 12704, 12800, 15880, 19850, 25408, 25600, 31760, 39700, 50816, 51200, 63520, 79400, 101632, 127040, 158800, 203264, 254080, 317600, 406528, 508160, 635200, 813056, 1016320, 1270400, 2032640, 2540800, 4065280, 5081600, 10163200, 20326400]

約数ペア:

[(1, 20326400), (2, 10163200), (4, 5081600), (5, 4065280), (8, 2540800), (10, 2032640), (16, 1270400), (20, 1016320), (25, 813056), (32, 635200), (40, 508160), (50, 406528), (64, 317600), (80, 254080), (100, 203264), (128, 158800), (160, 127040), (200, 101632), (256, 79400), (320, 63520), (397, 51200), (400, 50816), (512, 39700), (640, 31760), (794, 25600), (800, 25408), (1024, 19850), (1280, 15880), (1588, 12800), (1600, 12704), (1985, 10240), (2048, 9925), (2560, 7940), (3176, 6400), (3200, 6352), (3970, 5120)]