21037172

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{2953}}^1$

素因数の和:3107

約数の個数: 24

約数和(自身を含む): 39949896

約数和(自身を除く): 18912724

約数列:

[1, 2, 4, 13, 26, 52, 137, 274, 548, 1781, 2953, 3562, 5906, 7124, 11812, 38389, 76778, 153556, 404561, 809122, 1618244, 5259293, 10518586, 21037172]

約数ペア:

[(1, 21037172), (2, 10518586), (4, 5259293), (13, 1618244), (26, 809122), (52, 404561), (137, 153556), (274, 76778), (548, 38389), (1781, 11812), (2953, 7124), (3562, 5906)]