20856340

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{2477}}^1$

素因数の和:2907

約数の個数: 24

約数和(自身を含む): 43920072

約数和(自身を除く): 23063732

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 2477, 4210, 4954, 8420, 9908, 12385, 24770, 49540, 1042817, 2085634, 4171268, 5214085, 10428170, 20856340]

約数ペア:

[(1, 20856340), (2, 10428170), (4, 5214085), (5, 4171268), (10, 2085634), (20, 1042817), (421, 49540), (842, 24770), (1684, 12385), (2105, 9908), (2477, 8420), (4210, 4954)]