20340880

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5189}}^1$

素因数の和:5216

約数の個数: 60

約数和(自身を含む): 55024380

約数和(自身を除く): 34683500

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5189, 10378, 20756, 25945, 36323, 41512, 51890, 72646, 83024, 103780, 145292, 181615, 207560, 254261, 290584, 363230, 415120, 508522, 581168, 726460, 1017044, 1271305, 1452920, 2034088, 2542610, 2905840, 4068176, 5085220, 10170440, 20340880]

約数ペア:

[(1, 20340880), (2, 10170440), (4, 5085220), (5, 4068176), (7, 2905840), (8, 2542610), (10, 2034088), (14, 1452920), (16, 1271305), (20, 1017044), (28, 726460), (35, 581168), (40, 508522), (49, 415120), (56, 363230), (70, 290584), (80, 254261), (98, 207560), (112, 181615), (140, 145292), (196, 103780), (245, 83024), (280, 72646), (392, 51890), (490, 41512), (560, 36323), (784, 25945), (980, 20756), (1960, 10378), (3920, 5189)]