21855339

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1291}}^1$

素因数の和:1333

約数の個数: 40

約数和(自身を含む): 37519680

約数和(自身を除く): 15664341

約数列:

[1, 3, 9, 11, 19, 27, 33, 57, 81, 99, 171, 209, 297, 513, 627, 891, 1291, 1539, 1881, 3873, 5643, 11619, 14201, 16929, 24529, 34857, 42603, 73587, 104571, 127809, 220761, 269819, 383427, 662283, 809457, 1150281, 1986849, 2428371, 7285113, 21855339]

約数ペア:

[(1, 21855339), (3, 7285113), (9, 2428371), (11, 1986849), (19, 1150281), (27, 809457), (33, 662283), (57, 383427), (81, 269819), (99, 220761), (171, 127809), (209, 104571), (297, 73587), (513, 42603), (627, 34857), (891, 24529), (1291, 16929), (1539, 14201), (1881, 11619), (3873, 5643)]