21555380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13997}}^1$

素因数の和:14024

約数の個数: 48

約数和(自身を含む): 56439936

約数和(自身を除く): 34884556

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13997, 27994, 55988, 69985, 97979, 139970, 153967, 195958, 279940, 307934, 391916, 489895, 615868, 769835, 979790, 1077769, 1539670, 1959580, 2155538, 3079340, 4311076, 5388845, 10777690, 21555380]

約数ペア:

[(1, 21555380), (2, 10777690), (4, 5388845), (5, 4311076), (7, 3079340), (10, 2155538), (11, 1959580), (14, 1539670), (20, 1077769), (22, 979790), (28, 769835), (35, 615868), (44, 489895), (55, 391916), (70, 307934), (77, 279940), (110, 195958), (140, 153967), (154, 139970), (220, 97979), (308, 69985), (385, 55988), (770, 27994), (1540, 13997)]