221390990

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1\times {\mathrm{2011}}^1$

素因数の和:2228

約数の個数: 32

約数和(自身を含む): 406343520

約数和(自身を除く): 184952530

約数列:

[1, 2, 5, 10, 101, 109, 202, 218, 505, 545, 1010, 1090, 2011, 4022, 10055, 11009, 20110, 22018, 55045, 110090, 203111, 219199, 406222, 438398, 1015555, 1095995, 2031110, 2191990, 22139099, 44278198, 110695495, 221390990]

約数ペア:

[(1, 221390990), (2, 110695495), (5, 44278198), (10, 22139099), (101, 2191990), (109, 2031110), (202, 1095995), (218, 1015555), (505, 438398), (545, 406222), (1010, 219199), (1090, 203111), (2011, 110090), (4022, 55045), (10055, 22018), (11009, 20110)]