21991030

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{277}}^1\times {\mathrm{467}}^1$

素因数の和:768

約数の個数: 32

約数和(自身を含む): 42153696

約数和(自身を除く): 20162666

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 277, 467, 554, 934, 1385, 2335, 2770, 4670, 4709, 7939, 9418, 15878, 23545, 39695, 47090, 79390, 129359, 258718, 646795, 1293590, 2199103, 4398206, 10995515, 21991030]

約数ペア:

[(1, 21991030), (2, 10995515), (5, 4398206), (10, 2199103), (17, 1293590), (34, 646795), (85, 258718), (170, 129359), (277, 79390), (467, 47090), (554, 39695), (934, 23545), (1385, 15878), (2335, 9418), (2770, 7939), (4670, 4709)]