21686190

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{16811}}^1$

素因数の和:16864

約数の個数: 32

約数和(自身を含む): 53260416

約数和(自身を除く): 31574226

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 43, 86, 129, 215, 258, 430, 645, 1290, 16811, 33622, 50433, 84055, 100866, 168110, 252165, 504330, 722873, 1445746, 2168619, 3614365, 4337238, 7228730, 10843095, 21686190]

約数ペア:

[(1, 21686190), (2, 10843095), (3, 7228730), (5, 4337238), (6, 3614365), (10, 2168619), (15, 1445746), (30, 722873), (43, 504330), (86, 252165), (129, 168110), (215, 100866), (258, 84055), (430, 50433), (645, 33622), (1290, 16811)]