21318400

素因数分解:

$2^8\times 5^2\times {\mathrm{3331}}^1$

素因数の和:3357

約数の個数: 54

約数和(自身を含む): 52782212

約数和(自身を除く): 31463812

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 640, 800, 1280, 1600, 3200, 3331, 6400, 6662, 13324, 16655, 26648, 33310, 53296, 66620, 83275, 106592, 133240, 166550, 213184, 266480, 333100, 426368, 532960, 666200, 852736, 1065920, 1332400, 2131840, 2664800, 4263680, 5329600, 10659200, 21318400]

約数ペア:

[(1, 21318400), (2, 10659200), (4, 5329600), (5, 4263680), (8, 2664800), (10, 2131840), (16, 1332400), (20, 1065920), (25, 852736), (32, 666200), (40, 532960), (50, 426368), (64, 333100), (80, 266480), (100, 213184), (128, 166550), (160, 133240), (200, 106592), (256, 83275), (320, 66620), (400, 53296), (640, 33310), (800, 26648), (1280, 16655), (1600, 13324), (3200, 6662), (3331, 6400)]