21247688

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2029}}^1$

素因数の和:2070

約数の個数: 64

約数和(自身を含む): 52617600

約数和(自身を除く): 31369912

約数列:

[1, 2, 4, 7, 8, 11, 14, 17, 22, 28, 34, 44, 56, 68, 77, 88, 119, 136, 154, 187, 238, 308, 374, 476, 616, 748, 952, 1309, 1496, 2029, 2618, 4058, 5236, 8116, 10472, 14203, 16232, 22319, 28406, 34493, 44638, 56812, 68986, 89276, 113624, 137972, 156233, 178552, 241451, 275944, 312466, 379423, 482902, 624932, 758846, 965804, 1249864, 1517692, 1931608, 2655961, 3035384, 5311922, 10623844, 21247688]

約数ペア:

[(1, 21247688), (2, 10623844), (4, 5311922), (7, 3035384), (8, 2655961), (11, 1931608), (14, 1517692), (17, 1249864), (22, 965804), (28, 758846), (34, 624932), (44, 482902), (56, 379423), (68, 312466), (77, 275944), (88, 241451), (119, 178552), (136, 156233), (154, 137972), (187, 113624), (238, 89276), (308, 68986), (374, 56812), (476, 44638), (616, 34493), (748, 28406), (952, 22319), (1309, 16232), (1496, 14203), (2029, 10472), (2618, 8116), (4058, 5236)]