20809740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{49547}}^1$

素因数の和:49566

約数の個数: 48

約数和(自身を含む): 66592512

約数和(自身を除く): 45782772

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 49547, 99094, 148641, 198188, 247735, 297282, 346829, 495470, 594564, 693658, 743205, 990940, 1040487, 1387316, 1486410, 1734145, 2080974, 2972820, 3468290, 4161948, 5202435, 6936580, 10404870, 20809740]

約数ペア:

[(1, 20809740), (2, 10404870), (3, 6936580), (4, 5202435), (5, 4161948), (6, 3468290), (7, 2972820), (10, 2080974), (12, 1734145), (14, 1486410), (15, 1387316), (20, 1040487), (21, 990940), (28, 743205), (30, 693658), (35, 594564), (42, 495470), (60, 346829), (70, 297282), (84, 247735), (105, 198188), (140, 148641), (210, 99094), (420, 49547)]