18789925

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{227}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 29855232

約数和(自身を除く): 11065307

約数列:

[1, 5, 7, 11, 25, 35, 43, 55, 77, 175, 215, 227, 275, 301, 385, 473, 1075, 1135, 1505, 1589, 1925, 2365, 2497, 3311, 5675, 7525, 7945, 9761, 11825, 12485, 16555, 17479, 39725, 48805, 62425, 68327, 82775, 87395, 107371, 244025, 341635, 436975, 536855, 751597, 1708175, 2684275, 3757985, 18789925]

約数ペア:

[(1, 18789925), (5, 3757985), (7, 2684275), (11, 1708175), (25, 751597), (35, 536855), (43, 436975), (55, 341635), (77, 244025), (175, 107371), (215, 87395), (227, 82775), (275, 68327), (301, 62425), (385, 48805), (473, 39725), (1075, 17479), (1135, 16555), (1505, 12485), (1589, 11825), (1925, 9761), (2365, 7945), (2497, 7525), (3311, 5675)]