1981000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{283}}^1$

素因数の和:311

約数の個数: 64

約数和(自身を含む): 5316480

約数和(自身を除く): 3335480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 125, 140, 175, 200, 250, 280, 283, 350, 500, 566, 700, 875, 1000, 1132, 1400, 1415, 1750, 1981, 2264, 2830, 3500, 3962, 5660, 7000, 7075, 7924, 9905, 11320, 14150, 15848, 19810, 28300, 35375, 39620, 49525, 56600, 70750, 79240, 99050, 141500, 198100, 247625, 283000, 396200, 495250, 990500, 1981000]

約数ペア:

[(1, 1981000), (2, 990500), (4, 495250), (5, 396200), (7, 283000), (8, 247625), (10, 198100), (14, 141500), (20, 99050), (25, 79240), (28, 70750), (35, 56600), (40, 49525), (50, 39620), (56, 35375), (70, 28300), (100, 19810), (125, 15848), (140, 14150), (175, 11320), (200, 9905), (250, 7924), (280, 7075), (283, 7000), (350, 5660), (500, 3962), (566, 3500), (700, 2830), (875, 2264), (1000, 1981), (1132, 1750), (1400, 1415)]