21489700

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{12641}}^1$

素因数の和:12672

約数の個数: 36

約数和(自身を含む): 49379652

約数和(自身を除く): 27889952

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 100, 170, 340, 425, 850, 1700, 12641, 25282, 50564, 63205, 126410, 214897, 252820, 316025, 429794, 632050, 859588, 1074485, 1264100, 2148970, 4297940, 5372425, 10744850, 21489700]

約数ペア:

[(1, 21489700), (2, 10744850), (4, 5372425), (5, 4297940), (10, 2148970), (17, 1264100), (20, 1074485), (25, 859588), (34, 632050), (50, 429794), (68, 316025), (85, 252820), (100, 214897), (170, 126410), (340, 63205), (425, 50564), (850, 25282), (1700, 12641)]