21434912

素因数分解:

$2^5\times {\mathrm{61}}^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1$

素因数の和:289

約数の個数: 48

約数和(自身を含む): 43747200

約数和(自身を除く): 22312288

約数列:

[1, 2, 4, 8, 16, 32, 61, 79, 122, 139, 158, 244, 278, 316, 488, 556, 632, 976, 1112, 1264, 1952, 2224, 2528, 4448, 4819, 8479, 9638, 10981, 16958, 19276, 21962, 33916, 38552, 43924, 67832, 77104, 87848, 135664, 154208, 175696, 271328, 351392, 669841, 1339682, 2679364, 5358728, 10717456, 21434912]

約数ペア:

[(1, 21434912), (2, 10717456), (4, 5358728), (8, 2679364), (16, 1339682), (32, 669841), (61, 351392), (79, 271328), (122, 175696), (139, 154208), (158, 135664), (244, 87848), (278, 77104), (316, 67832), (488, 43924), (556, 38552), (632, 33916), (976, 21962), (1112, 19276), (1264, 16958), (1952, 10981), (2224, 9638), (2528, 8479), (4448, 4819)]