21094810

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:199

約数の個数: 64

約数和(自身を含む): 43732224

約数和(自身を除く): 22637414

約数列:

[1, 2, 5, 10, 11, 22, 37, 55, 71, 73, 74, 110, 142, 146, 185, 355, 365, 370, 407, 710, 730, 781, 803, 814, 1562, 1606, 2035, 2627, 2701, 3905, 4015, 4070, 5183, 5254, 5402, 7810, 8030, 10366, 13135, 13505, 25915, 26270, 27010, 28897, 29711, 51830, 57013, 57794, 59422, 114026, 144485, 148555, 191771, 285065, 288970, 297110, 383542, 570130, 958855, 1917710, 2109481, 4218962, 10547405, 21094810]

約数ペア:

[(1, 21094810), (2, 10547405), (5, 4218962), (10, 2109481), (11, 1917710), (22, 958855), (37, 570130), (55, 383542), (71, 297110), (73, 288970), (74, 285065), (110, 191771), (142, 148555), (146, 144485), (185, 114026), (355, 59422), (365, 57794), (370, 57013), (407, 51830), (710, 29711), (730, 28897), (781, 27010), (803, 26270), (814, 25915), (1562, 13505), (1606, 13135), (2035, 10366), (2627, 8030), (2701, 7810), (3905, 5402), (4015, 5254), (4070, 5183)]