19905172

素因数分解:

$2^2\times 7^2\times {\mathrm{41}}^1\times {\mathrm{2477}}^1$

素因数の和:2536

約数の個数: 36

約数和(自身を含む): 41526324

約数和(自身を除く): 21621152

約数列:

[1, 2, 4, 7, 14, 28, 41, 49, 82, 98, 164, 196, 287, 574, 1148, 2009, 2477, 4018, 4954, 8036, 9908, 17339, 34678, 69356, 101557, 121373, 203114, 242746, 406228, 485492, 710899, 1421798, 2843596, 4976293, 9952586, 19905172]

約数ペア:

[(1, 19905172), (2, 9952586), (4, 4976293), (7, 2843596), (14, 1421798), (28, 710899), (41, 485492), (49, 406228), (82, 242746), (98, 203114), (164, 121373), (196, 101557), (287, 69356), (574, 34678), (1148, 17339), (2009, 9908), (2477, 8036), (4018, 4954)]