21381888

素因数分解:

$2^8\times 3^1\times {\mathrm{11}}^1\times {\mathrm{2531}}^1$

素因数の和:2561

約数の個数: 72

約数和(自身を含む): 62104896

約数和(自身を除く): 40723008

約数列:

[1, 2, 3, 4, 6, 8, 11, 12, 16, 22, 24, 32, 33, 44, 48, 64, 66, 88, 96, 128, 132, 176, 192, 256, 264, 352, 384, 528, 704, 768, 1056, 1408, 2112, 2531, 2816, 4224, 5062, 7593, 8448, 10124, 15186, 20248, 27841, 30372, 40496, 55682, 60744, 80992, 83523, 111364, 121488, 161984, 167046, 222728, 242976, 323968, 334092, 445456, 485952, 647936, 668184, 890912, 971904, 1336368, 1781824, 1943808, 2672736, 3563648, 5345472, 7127296, 10690944, 21381888]

約数ペア:

[(1, 21381888), (2, 10690944), (3, 7127296), (4, 5345472), (6, 3563648), (8, 2672736), (11, 1943808), (12, 1781824), (16, 1336368), (22, 971904), (24, 890912), (32, 668184), (33, 647936), (44, 485952), (48, 445456), (64, 334092), (66, 323968), (88, 242976), (96, 222728), (128, 167046), (132, 161984), (176, 121488), (192, 111364), (256, 83523), (264, 80992), (352, 60744), (384, 55682), (528, 40496), (704, 30372), (768, 27841), (1056, 20248), (1408, 15186), (2112, 10124), (2531, 8448), (2816, 7593), (4224, 5062)]