39968000

素因数分解:

$2^8\times 5^3\times {\mathrm{1249}}^1$

素因数の和:1280

約数の個数: 72

約数和(自身を含む): 99645000

約数和(自身を除く): 59677000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 256, 320, 400, 500, 640, 800, 1000, 1249, 1280, 1600, 2000, 2498, 3200, 4000, 4996, 6245, 6400, 8000, 9992, 12490, 16000, 19984, 24980, 31225, 32000, 39968, 49960, 62450, 79936, 99920, 124900, 156125, 159872, 199840, 249800, 312250, 319744, 399680, 499600, 624500, 799360, 999200, 1249000, 1598720, 1998400, 2498000, 3996800, 4996000, 7993600, 9992000, 19984000, 39968000]

約数ペア:

[(1, 39968000), (2, 19984000), (4, 9992000), (5, 7993600), (8, 4996000), (10, 3996800), (16, 2498000), (20, 1998400), (25, 1598720), (32, 1249000), (40, 999200), (50, 799360), (64, 624500), (80, 499600), (100, 399680), (125, 319744), (128, 312250), (160, 249800), (200, 199840), (250, 159872), (256, 156125), (320, 124900), (400, 99920), (500, 79936), (640, 62450), (800, 49960), (1000, 39968), (1249, 32000), (1280, 31225), (1600, 24980), (2000, 19984), (2498, 16000), (3200, 12490), (4000, 9992), (4996, 8000), (6245, 6400)]