20890156

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{587}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 44255232

約数和(自身を除く): 23365076

約数列:

[1, 2, 4, 7, 14, 28, 31, 41, 62, 82, 124, 164, 217, 287, 434, 574, 587, 868, 1148, 1174, 1271, 2348, 2542, 4109, 5084, 8218, 8897, 16436, 17794, 18197, 24067, 35588, 36394, 48134, 72788, 96268, 127379, 168469, 254758, 336938, 509516, 673876, 746077, 1492154, 2984308, 5222539, 10445078, 20890156]

約数ペア:

[(1, 20890156), (2, 10445078), (4, 5222539), (7, 2984308), (14, 1492154), (28, 746077), (31, 673876), (41, 509516), (62, 336938), (82, 254758), (124, 168469), (164, 127379), (217, 96268), (287, 72788), (434, 48134), (574, 36394), (587, 35588), (868, 24067), (1148, 18197), (1174, 17794), (1271, 16436), (2348, 8897), (2542, 8218), (4109, 5084)]