21978656

素因数分解:

$2^5\times 7^2\times {\mathrm{107}}^1\times {\mathrm{131}}^1$

素因数の和:262

約数の個数: 72

約数和(自身を含む): 51193296

約数和(自身を除く): 29214640

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 98, 107, 112, 131, 196, 214, 224, 262, 392, 428, 524, 749, 784, 856, 917, 1048, 1498, 1568, 1712, 1834, 2096, 2996, 3424, 3668, 4192, 5243, 5992, 6419, 7336, 10486, 11984, 12838, 14017, 14672, 20972, 23968, 25676, 28034, 29344, 41944, 51352, 56068, 83888, 98119, 102704, 112136, 167776, 196238, 205408, 224272, 392476, 448544, 686833, 784952, 1373666, 1569904, 2747332, 3139808, 5494664, 10989328, 21978656]

約数ペア:

[(1, 21978656), (2, 10989328), (4, 5494664), (7, 3139808), (8, 2747332), (14, 1569904), (16, 1373666), (28, 784952), (32, 686833), (49, 448544), (56, 392476), (98, 224272), (107, 205408), (112, 196238), (131, 167776), (196, 112136), (214, 102704), (224, 98119), (262, 83888), (392, 56068), (428, 51352), (524, 41944), (749, 29344), (784, 28034), (856, 25676), (917, 23968), (1048, 20972), (1498, 14672), (1568, 14017), (1712, 12838), (1834, 11984), (2096, 10486), (2996, 7336), (3424, 6419), (3668, 5992), (4192, 5243)]