21185406

素因数分解:

$2^1\times 3^2\times {\mathrm{11}}^2\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:238

約数の個数: 72

約数和(自身を含む): 51538032

約数和(自身を除く): 30352626

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 33, 66, 71, 99, 121, 137, 142, 198, 213, 242, 274, 363, 411, 426, 639, 726, 781, 822, 1089, 1233, 1278, 1507, 1562, 2178, 2343, 2466, 3014, 4521, 4686, 7029, 8591, 9042, 9727, 13563, 14058, 16577, 17182, 19454, 25773, 27126, 29181, 33154, 49731, 51546, 58362, 77319, 87543, 99462, 106997, 149193, 154638, 175086, 213994, 298386, 320991, 641982, 962973, 1176967, 1925946, 2353934, 3530901, 7061802, 10592703, 21185406]

約数ペア:

[(1, 21185406), (2, 10592703), (3, 7061802), (6, 3530901), (9, 2353934), (11, 1925946), (18, 1176967), (22, 962973), (33, 641982), (66, 320991), (71, 298386), (99, 213994), (121, 175086), (137, 154638), (142, 149193), (198, 106997), (213, 99462), (242, 87543), (274, 77319), (363, 58362), (411, 51546), (426, 49731), (639, 33154), (726, 29181), (781, 27126), (822, 25773), (1089, 19454), (1233, 17182), (1278, 16577), (1507, 14058), (1562, 13563), (2178, 9727), (2343, 9042), (2466, 8591), (3014, 7029), (4521, 4686)]