31984000

素因数分解:

$2^7\times 5^3\times {\mathrm{1999}}^1$

素因数の和:2028

約数の個数: 64

約数和(自身を含む): 79560000

約数和(自身を除く): 47576000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 400, 500, 640, 800, 1000, 1600, 1999, 2000, 3200, 3998, 4000, 7996, 8000, 9995, 15992, 16000, 19990, 31984, 39980, 49975, 63968, 79960, 99950, 127936, 159920, 199900, 249875, 255872, 319840, 399800, 499750, 639680, 799600, 999500, 1279360, 1599200, 1999000, 3198400, 3998000, 6396800, 7996000, 15992000, 31984000]

約数ペア:

[(1, 31984000), (2, 15992000), (4, 7996000), (5, 6396800), (8, 3998000), (10, 3198400), (16, 1999000), (20, 1599200), (25, 1279360), (32, 999500), (40, 799600), (50, 639680), (64, 499750), (80, 399800), (100, 319840), (125, 255872), (128, 249875), (160, 199900), (200, 159920), (250, 127936), (320, 99950), (400, 79960), (500, 63968), (640, 49975), (800, 39980), (1000, 31984), (1600, 19990), (1999, 16000), (2000, 15992), (3200, 9995), (3998, 8000), (4000, 7996)]