206780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{211}}^1$

素因数の和:234

約数の個数: 36

約数和(自身を含む): 507528

約数和(自身を除く): 300748

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 211, 245, 422, 490, 844, 980, 1055, 1477, 2110, 2954, 4220, 5908, 7385, 10339, 14770, 20678, 29540, 41356, 51695, 103390, 206780]

約数ペア:

[(1, 206780), (2, 103390), (4, 51695), (5, 41356), (7, 29540), (10, 20678), (14, 14770), (20, 10339), (28, 7385), (35, 5908), (49, 4220), (70, 2954), (98, 2110), (140, 1477), (196, 1055), (211, 980), (245, 844), (422, 490)]