21286958

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{173}}^1$

素因数の和:257

約数の個数: 64

約数和(自身を含む): 43296768

約数和(自身を除く): 22009810

約数列:

[1, 2, 7, 11, 14, 17, 22, 34, 47, 77, 94, 119, 154, 173, 187, 238, 329, 346, 374, 517, 658, 799, 1034, 1211, 1309, 1598, 1903, 2422, 2618, 2941, 3619, 3806, 5593, 5882, 7238, 8131, 8789, 11186, 13321, 16262, 17578, 20587, 26642, 32351, 41174, 56917, 61523, 64702, 89441, 113834, 123046, 138227, 178882, 226457, 276454, 452914, 626087, 967589, 1252174, 1520497, 1935178, 3040994, 10643479, 21286958]

約数ペア:

[(1, 21286958), (2, 10643479), (7, 3040994), (11, 1935178), (14, 1520497), (17, 1252174), (22, 967589), (34, 626087), (47, 452914), (77, 276454), (94, 226457), (119, 178882), (154, 138227), (173, 123046), (187, 113834), (238, 89441), (329, 64702), (346, 61523), (374, 56917), (517, 41174), (658, 32351), (799, 26642), (1034, 20587), (1211, 17578), (1309, 16262), (1598, 13321), (1903, 11186), (2422, 8789), (2618, 8131), (2941, 7238), (3619, 5882), (3806, 5593)]