21490533

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 35582976

約数和(自身を除く): 14092443

約数列:

[1, 3, 9, 17, 23, 31, 51, 69, 93, 153, 197, 207, 279, 391, 527, 591, 713, 1173, 1581, 1773, 2139, 3349, 3519, 4531, 4743, 6107, 6417, 10047, 12121, 13593, 18321, 30141, 36363, 40779, 54963, 77027, 103819, 109089, 140461, 231081, 311457, 421383, 693243, 934371, 1264149, 2387837, 7163511, 21490533]

約数ペア:

[(1, 21490533), (3, 7163511), (9, 2387837), (17, 1264149), (23, 934371), (31, 693243), (51, 421383), (69, 311457), (93, 231081), (153, 140461), (197, 109089), (207, 103819), (279, 77027), (391, 54963), (527, 40779), (591, 36363), (713, 30141), (1173, 18321), (1581, 13593), (1773, 12121), (2139, 10047), (3349, 6417), (3519, 6107), (4531, 4743)]