19664379

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{331}}^1$

素因数の和:408

約数の個数: 48

約数和(自身を含む): 34804224

約数和(自身を除く): 15139845

約数列:

[1, 3, 7, 9, 21, 23, 41, 63, 69, 123, 161, 207, 287, 331, 369, 483, 861, 943, 993, 1449, 2317, 2583, 2829, 2979, 6601, 6951, 7613, 8487, 13571, 19803, 20853, 22839, 40713, 53291, 59409, 68517, 94997, 122139, 159873, 284991, 312133, 479619, 854973, 936399, 2184931, 2809197, 6554793, 19664379]

約数ペア:

[(1, 19664379), (3, 6554793), (7, 2809197), (9, 2184931), (21, 936399), (23, 854973), (41, 479619), (63, 312133), (69, 284991), (123, 159873), (161, 122139), (207, 94997), (287, 68517), (331, 59409), (369, 53291), (483, 40713), (861, 22839), (943, 20853), (993, 19803), (1449, 13571), (2317, 8487), (2583, 7613), (2829, 6951), (2979, 6601)]