21408970

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1$

素因数の和:207

約数の個数: 64

約数和(自身を含む): 44416512

約数和(自身を除く): 23007542

約数列:

[1, 2, 5, 10, 11, 22, 41, 47, 55, 82, 94, 101, 110, 202, 205, 235, 410, 451, 470, 505, 517, 902, 1010, 1034, 1111, 1927, 2222, 2255, 2585, 3854, 4141, 4510, 4747, 5170, 5555, 8282, 9494, 9635, 11110, 19270, 20705, 21197, 23735, 41410, 42394, 45551, 47470, 52217, 91102, 104434, 105985, 194627, 211970, 227755, 261085, 389254, 455510, 522170, 973135, 1946270, 2140897, 4281794, 10704485, 21408970]

約数ペア:

[(1, 21408970), (2, 10704485), (5, 4281794), (10, 2140897), (11, 1946270), (22, 973135), (41, 522170), (47, 455510), (55, 389254), (82, 261085), (94, 227755), (101, 211970), (110, 194627), (202, 105985), (205, 104434), (235, 91102), (410, 52217), (451, 47470), (470, 45551), (505, 42394), (517, 41410), (902, 23735), (1010, 21197), (1034, 20705), (1111, 19270), (1927, 11110), (2222, 9635), (2255, 9494), (2585, 8282), (3854, 5555), (4141, 5170), (4510, 4747)]