17980963

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:136

約数の個数: 48

約数和(自身を含む): 25740288

約数和(自身を除く): 7759325

約数列:

[1, 7, 11, 13, 23, 71, 77, 91, 121, 143, 161, 253, 299, 497, 781, 847, 923, 1001, 1573, 1633, 1771, 2093, 2783, 3289, 5467, 6461, 8591, 10153, 11011, 11431, 17963, 19481, 21229, 23023, 36179, 60137, 71071, 111683, 125741, 148603, 197593, 233519, 253253, 781781, 1383151, 1634633, 2568709, 17980963]

約数ペア:

[(1, 17980963), (7, 2568709), (11, 1634633), (13, 1383151), (23, 781781), (71, 253253), (77, 233519), (91, 197593), (121, 148603), (143, 125741), (161, 111683), (253, 71071), (299, 60137), (497, 36179), (781, 23023), (847, 21229), (923, 19481), (1001, 17963), (1573, 11431), (1633, 11011), (1771, 10153), (2093, 8591), (2783, 6461), (3289, 5467)]