21214395

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{199}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 38937600

約数和(自身を除く): 17723205

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 103, 115, 199, 207, 309, 345, 515, 597, 927, 995, 1035, 1545, 1791, 2369, 2985, 4577, 4635, 7107, 8955, 11845, 13731, 20497, 21321, 22885, 35535, 41193, 61491, 68655, 102485, 106605, 184473, 205965, 307455, 471431, 922365, 1414293, 2357155, 4242879, 7071465, 21214395]

約数ペア:

[(1, 21214395), (3, 7071465), (5, 4242879), (9, 2357155), (15, 1414293), (23, 922365), (45, 471431), (69, 307455), (103, 205965), (115, 184473), (199, 106605), (207, 102485), (309, 68655), (345, 61491), (515, 41193), (597, 35535), (927, 22885), (995, 21321), (1035, 20497), (1545, 13731), (1791, 11845), (2369, 8955), (2985, 7107), (4577, 4635)]