21085744

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{499}}^1$

素因数の和:665

約数の個数: 40

約数和(自身を含む): 43400000

約数和(自身を除く): 22314256

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 139, 152, 278, 304, 499, 556, 998, 1112, 1996, 2224, 2641, 3992, 5282, 7984, 9481, 10564, 18962, 21128, 37924, 42256, 69361, 75848, 138722, 151696, 277444, 554888, 1109776, 1317859, 2635718, 5271436, 10542872, 21085744]

約数ペア:

[(1, 21085744), (2, 10542872), (4, 5271436), (8, 2635718), (16, 1317859), (19, 1109776), (38, 554888), (76, 277444), (139, 151696), (152, 138722), (278, 75848), (304, 69361), (499, 42256), (556, 37924), (998, 21128), (1112, 18962), (1996, 10564), (2224, 9481), (2641, 7984), (3992, 5282)]