646640

素因数分解:

$2^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{137}}^1$

素因数の和:209

約数の個数: 40

約数和(自身を含む): 1540080

約数和(自身を除く): 893440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 59, 80, 118, 137, 236, 274, 295, 472, 548, 590, 685, 944, 1096, 1180, 1370, 2192, 2360, 2740, 4720, 5480, 8083, 10960, 16166, 32332, 40415, 64664, 80830, 129328, 161660, 323320, 646640]

約数ペア:

[(1, 646640), (2, 323320), (4, 161660), (5, 129328), (8, 80830), (10, 64664), (16, 40415), (20, 32332), (40, 16166), (59, 10960), (80, 8083), (118, 5480), (137, 4720), (236, 2740), (274, 2360), (295, 2192), (472, 1370), (548, 1180), (590, 1096), (685, 944)]