20999090

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{9677}}^1$

素因数の和:9722

約数の個数: 32

約数和(自身を含む): 44596224

約数和(自身を除く): 23597134

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 62, 70, 155, 217, 310, 434, 1085, 2170, 9677, 19354, 48385, 67739, 96770, 135478, 299987, 338695, 599974, 677390, 1499935, 2099909, 2999870, 4199818, 10499545, 20999090]

約数ペア:

[(1, 20999090), (2, 10499545), (5, 4199818), (7, 2999870), (10, 2099909), (14, 1499935), (31, 677390), (35, 599974), (62, 338695), (70, 299987), (155, 135478), (217, 96770), (310, 67739), (434, 48385), (1085, 19354), (2170, 9677)]