21909664

素因数分解:

$2^5\times 7^2\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:270

約数の個数: 72

約数和(自身を含む): 51064020

約数和(自身を除く): 29154356

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 89, 98, 112, 157, 178, 196, 224, 314, 356, 392, 623, 628, 712, 784, 1099, 1246, 1256, 1424, 1568, 2198, 2492, 2512, 2848, 4361, 4396, 4984, 5024, 7693, 8722, 8792, 9968, 13973, 15386, 17444, 17584, 19936, 27946, 30772, 34888, 35168, 55892, 61544, 69776, 97811, 111784, 123088, 139552, 195622, 223568, 246176, 391244, 447136, 684677, 782488, 1369354, 1564976, 2738708, 3129952, 5477416, 10954832, 21909664]

約数ペア:

[(1, 21909664), (2, 10954832), (4, 5477416), (7, 3129952), (8, 2738708), (14, 1564976), (16, 1369354), (28, 782488), (32, 684677), (49, 447136), (56, 391244), (89, 246176), (98, 223568), (112, 195622), (157, 139552), (178, 123088), (196, 111784), (224, 97811), (314, 69776), (356, 61544), (392, 55892), (623, 35168), (628, 34888), (712, 30772), (784, 27946), (1099, 19936), (1246, 17584), (1256, 17444), (1424, 15386), (1568, 13973), (2198, 9968), (2492, 8792), (2512, 8722), (2848, 7693), (4361, 5024), (4396, 4984)]