18691211

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 25090560

約数和(自身を除く): 6399349

約数列:

[1, 7, 11, 17, 77, 109, 119, 131, 187, 763, 917, 1199, 1309, 1441, 1853, 2227, 8393, 10087, 12971, 14279, 15589, 20383, 24497, 99953, 142681, 157069, 171479, 242743, 1099483, 1699201, 2670173, 18691211]

約数ペア:

[(1, 18691211), (7, 2670173), (11, 1699201), (17, 1099483), (77, 242743), (109, 171479), (119, 157069), (131, 142681), (187, 99953), (763, 24497), (917, 20383), (1199, 15589), (1309, 14279), (1441, 12971), (1853, 10087), (2227, 8393)]