19941775

素因数分解:

$5^2\times 7^2\times {\mathrm{73}}^1\times {\mathrm{223}}^1$

素因数の和:320

約数の個数: 36

約数和(自身を含む): 29289792

約数和(自身を除く): 9348017

約数列:

[1, 5, 7, 25, 35, 49, 73, 175, 223, 245, 365, 511, 1115, 1225, 1561, 1825, 2555, 3577, 5575, 7805, 10927, 12775, 16279, 17885, 39025, 54635, 81395, 89425, 113953, 273175, 406975, 569765, 797671, 2848825, 3988355, 19941775]

約数ペア:

[(1, 19941775), (5, 3988355), (7, 2848825), (25, 797671), (35, 569765), (49, 406975), (73, 273175), (175, 113953), (223, 89425), (245, 81395), (365, 54635), (511, 39025), (1115, 17885), (1225, 16279), (1561, 12775), (1825, 10927), (2555, 7805), (3577, 5575)]