201996905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{181}}^1\times {\mathrm{197}}^1$

素因数の和:497

約数の個数: 32

約数和(自身を含む): 269837568

約数和(自身を除く): 67840663

約数列:

[1, 5, 11, 55, 103, 181, 197, 515, 905, 985, 1133, 1991, 2167, 5665, 9955, 10835, 18643, 20291, 35657, 93215, 101455, 178285, 205073, 223201, 392227, 1025365, 1116005, 1961135, 3672671, 18363355, 40399381, 201996905]

約数ペア:

[(1, 201996905), (5, 40399381), (11, 18363355), (55, 3672671), (103, 1961135), (181, 1116005), (197, 1025365), (515, 392227), (905, 223201), (985, 205073), (1133, 178285), (1991, 101455), (2167, 93215), (5665, 35657), (9955, 20291), (10835, 18643)]