19974400

素因数分解:

$2^8\times 5^2\times {\mathrm{3121}}^1$

素因数の和:3147

約数の個数: 54

約数和(自身を含む): 49455602

約数和(自身を除く): 29481202

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, 3121, 3200, 6242, 6400, 12484, 15605, 24968, 31210, 49936, 62420, 78025, 99872, 124840, 156050, 199744, 249680, 312100, 399488, 499360, 624200, 798976, 998720, 1248400, 1997440, 2496800, 3994880, 4993600, 9987200, 19974400]

約数ペア:

[(1, 19974400), (2, 9987200), (4, 4993600), (5, 3994880), (8, 2496800), (10, 1997440), (16, 1248400), (20, 998720), (25, 798976), (32, 624200), (40, 499360), (50, 399488), (64, 312100), (80, 249680), (100, 199744), (128, 156050), (160, 124840), (200, 99872), (256, 78025), (320, 62420), (400, 49936), (640, 31210), (800, 24968), (1280, 15605), (1600, 12484), (3121, 6400), (3200, 6242)]