21075712

素因数分解:

$2^8\times 7^1\times {\mathrm{19}}^1\times {\mathrm{619}}^1$

素因数の和:661

約数の個数: 72

約数和(自身を含む): 50691200

約数和(自身を除く): 29615488

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 32, 38, 56, 64, 76, 112, 128, 133, 152, 224, 256, 266, 304, 448, 532, 608, 619, 896, 1064, 1216, 1238, 1792, 2128, 2432, 2476, 4256, 4333, 4864, 4952, 8512, 8666, 9904, 11761, 17024, 17332, 19808, 23522, 34048, 34664, 39616, 47044, 69328, 79232, 82327, 94088, 138656, 158464, 164654, 188176, 277312, 329308, 376352, 554624, 658616, 752704, 1109248, 1317232, 1505408, 2634464, 3010816, 5268928, 10537856, 21075712]

約数ペア:

[(1, 21075712), (2, 10537856), (4, 5268928), (7, 3010816), (8, 2634464), (14, 1505408), (16, 1317232), (19, 1109248), (28, 752704), (32, 658616), (38, 554624), (56, 376352), (64, 329308), (76, 277312), (112, 188176), (128, 164654), (133, 158464), (152, 138656), (224, 94088), (256, 82327), (266, 79232), (304, 69328), (448, 47044), (532, 39616), (608, 34664), (619, 34048), (896, 23522), (1064, 19808), (1216, 17332), (1238, 17024), (1792, 11761), (2128, 9904), (2432, 8666), (2476, 8512), (4256, 4952), (4333, 4864)]