19908553

素因数分解:

$7^2\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1$

素因数の和:269

約数の個数: 24

約数和(自身を含む): 24259200

約数和(自身を除く): 4350647

約数列:

[1, 7, 37, 49, 79, 139, 259, 553, 973, 1813, 2923, 3871, 5143, 6811, 10981, 20461, 36001, 76867, 143227, 252007, 406297, 538069, 2844079, 19908553]

約数ペア:

[(1, 19908553), (7, 2844079), (37, 538069), (49, 406297), (79, 252007), (139, 143227), (259, 76867), (553, 36001), (973, 20461), (1813, 10981), (2923, 6811), (3871, 5143)]