21156646

素因数分解:

$2^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{28513}}^1$

素因数の和:28575

約数の個数: 16

約数和(自身を含む): 36954144

約数和(自身を除く): 15797498

約数列:

[1, 2, 7, 14, 53, 106, 371, 742, 28513, 57026, 199591, 399182, 1511189, 3022378, 10578323, 21156646]

約数ペア:

[(1, 21156646), (2, 10578323), (7, 3022378), (14, 1511189), (53, 399182), (106, 199591), (371, 57026), (742, 28513)]