20002780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20411}}^1$

素因数の和:20434

約数の個数: 36

約数和(自身を含む): 48866328

約数和(自身を除く): 28863548

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20411, 40822, 81644, 102055, 142877, 204110, 285754, 408220, 571508, 714385, 1000139, 1428770, 2000278, 2857540, 4000556, 5000695, 10001390, 20002780]

約数ペア:

[(1, 20002780), (2, 10001390), (4, 5000695), (5, 4000556), (7, 2857540), (10, 2000278), (14, 1428770), (20, 1000139), (28, 714385), (35, 571508), (49, 408220), (70, 285754), (98, 204110), (140, 142877), (196, 102055), (245, 81644), (490, 40822), (980, 20411)]