21421341

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{449}}^1$

素因数の和:511

約数の個数: 40

約数和(自身を含む): 34848000

約数和(自身を除く): 13426659

約数列:

[1, 3, 9, 19, 27, 31, 57, 81, 93, 171, 279, 449, 513, 589, 837, 1347, 1539, 1767, 2511, 4041, 5301, 8531, 12123, 13919, 15903, 25593, 36369, 41757, 47709, 76779, 125271, 230337, 264461, 375813, 691011, 793383, 1127439, 2380149, 7140447, 21421341]

約数ペア:

[(1, 21421341), (3, 7140447), (9, 2380149), (19, 1127439), (27, 793383), (31, 691011), (57, 375813), (81, 264461), (93, 230337), (171, 125271), (279, 76779), (449, 47709), (513, 41757), (589, 36369), (837, 25593), (1347, 15903), (1539, 13919), (1767, 12123), (2511, 8531), (4041, 5301)]