20718208

素因数分解:

$2^7\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1217}}^1$

素因数の和:1257

約数の個数: 64

約数和(自身を含む): 49694400

約数和(自身を除く): 28976192

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 32, 38, 56, 64, 76, 112, 128, 133, 152, 224, 266, 304, 448, 532, 608, 896, 1064, 1216, 1217, 2128, 2432, 2434, 4256, 4868, 8512, 8519, 9736, 17024, 17038, 19472, 23123, 34076, 38944, 46246, 68152, 77888, 92492, 136304, 155776, 161861, 184984, 272608, 323722, 369968, 545216, 647444, 739936, 1090432, 1294888, 1479872, 2589776, 2959744, 5179552, 10359104, 20718208]

約数ペア:

[(1, 20718208), (2, 10359104), (4, 5179552), (7, 2959744), (8, 2589776), (14, 1479872), (16, 1294888), (19, 1090432), (28, 739936), (32, 647444), (38, 545216), (56, 369968), (64, 323722), (76, 272608), (112, 184984), (128, 161861), (133, 155776), (152, 136304), (224, 92492), (266, 77888), (304, 68152), (448, 46246), (532, 38944), (608, 34076), (896, 23123), (1064, 19472), (1216, 17038), (1217, 17024), (2128, 9736), (2432, 8519), (2434, 8512), (4256, 4868)]