21211904

素因数分解:

$2^8\times 7^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1$

素因数の和:138

約数の個数: 108

約数和(自身を含む): 52428600

約数和(自身を除く): 31216696

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 32, 38, 49, 56, 64, 76, 89, 98, 112, 128, 133, 152, 178, 196, 224, 256, 266, 304, 356, 392, 448, 532, 608, 623, 712, 784, 896, 931, 1064, 1216, 1246, 1424, 1568, 1691, 1792, 1862, 2128, 2432, 2492, 2848, 3136, 3382, 3724, 4256, 4361, 4864, 4984, 5696, 6272, 6764, 7448, 8512, 8722, 9968, 11392, 11837, 12544, 13528, 14896, 17024, 17444, 19936, 22784, 23674, 27056, 29792, 34048, 34888, 39872, 47348, 54112, 59584, 69776, 79744, 82859, 94696, 108224, 119168, 139552, 159488, 165718, 189392, 216448, 238336, 279104, 331436, 378784, 432896, 558208, 662872, 757568, 1116416, 1325744, 1515136, 2651488, 3030272, 5302976, 10605952, 21211904]

約数ペア:

[(1, 21211904), (2, 10605952), (4, 5302976), (7, 3030272), (8, 2651488), (14, 1515136), (16, 1325744), (19, 1116416), (28, 757568), (32, 662872), (38, 558208), (49, 432896), (56, 378784), (64, 331436), (76, 279104), (89, 238336), (98, 216448), (112, 189392), (128, 165718), (133, 159488), (152, 139552), (178, 119168), (196, 108224), (224, 94696), (256, 82859), (266, 79744), (304, 69776), (356, 59584), (392, 54112), (448, 47348), (532, 39872), (608, 34888), (623, 34048), (712, 29792), (784, 27056), (896, 23674), (931, 22784), (1064, 19936), (1216, 17444), (1246, 17024), (1424, 14896), (1568, 13528), (1691, 12544), (1792, 11837), (1862, 11392), (2128, 9968), (2432, 8722), (2492, 8512), (2848, 7448), (3136, 6764), (3382, 6272), (3724, 5696), (4256, 4984), (4361, 4864)]