21288008

素因数分解:

$2^3\times 7^1\times {\mathrm{97}}^1\times {\mathrm{3919}}^1$

素因数の和:4029

約数の個数: 32

約数和(自身を含む): 46099200

約数和(自身を除く): 24811192

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 97, 194, 388, 679, 776, 1358, 2716, 3919, 5432, 7838, 15676, 27433, 31352, 54866, 109732, 219464, 380143, 760286, 1520572, 2661001, 3041144, 5322002, 10644004, 21288008]

約数ペア:

[(1, 21288008), (2, 10644004), (4, 5322002), (7, 3041144), (8, 2661001), (14, 1520572), (28, 760286), (56, 380143), (97, 219464), (194, 109732), (388, 54866), (679, 31352), (776, 27433), (1358, 15676), (2716, 7838), (3919, 5432)]