20681577

素因数分解:

$3^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{2039}}^1$

素因数の和:2082

約数の個数: 36

約数和(自身を含む): 36279360

約数和(自身を除く): 15597783

約数列:

[1, 3, 7, 9, 21, 23, 49, 63, 69, 147, 161, 207, 441, 483, 1127, 1449, 2039, 3381, 6117, 10143, 14273, 18351, 42819, 46897, 99911, 128457, 140691, 299733, 328279, 422073, 899199, 984837, 2297953, 2954511, 6893859, 20681577]

約数ペア:

[(1, 20681577), (3, 6893859), (7, 2954511), (9, 2297953), (21, 984837), (23, 899199), (49, 422073), (63, 328279), (69, 299733), (147, 140691), (161, 128457), (207, 99911), (441, 46897), (483, 42819), (1127, 18351), (1449, 14273), (2039, 10143), (3381, 6117)]