20678427

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{563}}^1$

素因数の和:640

約数の個数: 48

約数和(自身を含む): 38009088

約数和(自身を除く): 17330661

約数列:

[1, 3, 7, 9, 11, 21, 33, 53, 63, 77, 99, 159, 231, 371, 477, 563, 583, 693, 1113, 1689, 1749, 3339, 3941, 4081, 5067, 5247, 6193, 11823, 12243, 18579, 29839, 35469, 36729, 43351, 55737, 89517, 130053, 208873, 268551, 328229, 390159, 626619, 984687, 1879857, 2297603, 2954061, 6892809, 20678427]

約数ペア:

[(1, 20678427), (3, 6892809), (7, 2954061), (9, 2297603), (11, 1879857), (21, 984687), (33, 626619), (53, 390159), (63, 328229), (77, 268551), (99, 208873), (159, 130053), (231, 89517), (371, 55737), (477, 43351), (563, 36729), (583, 35469), (693, 29839), (1113, 18579), (1689, 12243), (1749, 11823), (3339, 6193), (3941, 5247), (4081, 5067)]