20458998

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{397}}^1\times {\mathrm{409}}^1$

素因数の和:821

約数の個数: 48

約数和(自身を含む): 50912160

約数和(自身を除く): 30453162

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 397, 409, 794, 818, 1191, 1227, 2382, 2454, 2779, 2863, 3573, 3681, 5558, 5726, 7146, 7362, 8337, 8589, 16674, 17178, 25011, 25767, 50022, 51534, 162373, 324746, 487119, 974238, 1136611, 1461357, 2273222, 2922714, 3409833, 6819666, 10229499, 20458998]

約数ペア:

[(1, 20458998), (2, 10229499), (3, 6819666), (6, 3409833), (7, 2922714), (9, 2273222), (14, 1461357), (18, 1136611), (21, 974238), (42, 487119), (63, 324746), (126, 162373), (397, 51534), (409, 50022), (794, 25767), (818, 25011), (1191, 17178), (1227, 16674), (2382, 8589), (2454, 8337), (2779, 7362), (2863, 7146), (3573, 5726), (3681, 5558)]