18390880

素因数分解:

$2^5\times 5^1\times {\mathrm{137}}^1\times {\mathrm{839}}^1$

素因数の和:991

約数の個数: 48

約数和(自身を含む): 43817760

約数和(自身を除く): 25426880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 137, 160, 274, 548, 685, 839, 1096, 1370, 1678, 2192, 2740, 3356, 4195, 4384, 5480, 6712, 8390, 10960, 13424, 16780, 21920, 26848, 33560, 67120, 114943, 134240, 229886, 459772, 574715, 919544, 1149430, 1839088, 2298860, 3678176, 4597720, 9195440, 18390880]

約数ペア:

[(1, 18390880), (2, 9195440), (4, 4597720), (5, 3678176), (8, 2298860), (10, 1839088), (16, 1149430), (20, 919544), (32, 574715), (40, 459772), (80, 229886), (137, 134240), (160, 114943), (274, 67120), (548, 33560), (685, 26848), (839, 21920), (1096, 16780), (1370, 13424), (1678, 10960), (2192, 8390), (2740, 6712), (3356, 5480), (4195, 4384)]