20452180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{347}}^1\times {\mathrm{421}}^1$

素因数の和:784

約数の個数: 48

約数和(自身を含む): 49343616

約数和(自身を除く): 28891436

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 347, 421, 694, 842, 1388, 1684, 1735, 2105, 2429, 2947, 3470, 4210, 4858, 5894, 6940, 8420, 9716, 11788, 12145, 14735, 24290, 29470, 48580, 58940, 146087, 292174, 584348, 730435, 1022609, 1460870, 2045218, 2921740, 4090436, 5113045, 10226090, 20452180]

約数ペア:

[(1, 20452180), (2, 10226090), (4, 5113045), (5, 4090436), (7, 2921740), (10, 2045218), (14, 1460870), (20, 1022609), (28, 730435), (35, 584348), (70, 292174), (140, 146087), (347, 58940), (421, 48580), (694, 29470), (842, 24290), (1388, 14735), (1684, 12145), (1735, 11788), (2105, 9716), (2429, 8420), (2947, 6940), (3470, 5894), (4210, 4858)]