21037280

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11953}}^1$

素因数の和:11979

約数の個数: 48

約数和(自身を含む): 54223344

約数和(自身を除く): 33186064

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11953, 23906, 47812, 59765, 95624, 119530, 131483, 191248, 239060, 262966, 382496, 478120, 525932, 657415, 956240, 1051864, 1314830, 1912480, 2103728, 2629660, 4207456, 5259320, 10518640, 21037280]

約数ペア:

[(1, 21037280), (2, 10518640), (4, 5259320), (5, 4207456), (8, 2629660), (10, 2103728), (11, 1912480), (16, 1314830), (20, 1051864), (22, 956240), (32, 657415), (40, 525932), (44, 478120), (55, 382496), (80, 262966), (88, 239060), (110, 191248), (160, 131483), (176, 119530), (220, 95624), (352, 59765), (440, 47812), (880, 23906), (1760, 11953)]