19002991

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:231

約数の個数: 32

約数和(自身を含む): 24634368

約数和(自身を除く): 5631377

約数列:

[1, 7, 17, 23, 53, 119, 131, 161, 371, 391, 901, 917, 1219, 2227, 2737, 3013, 6307, 6943, 8533, 15589, 20723, 21091, 48601, 51221, 118031, 145061, 159689, 358547, 826217, 1117823, 2714713, 19002991]

約数ペア:

[(1, 19002991), (7, 2714713), (17, 1117823), (23, 826217), (53, 358547), (119, 159689), (131, 145061), (161, 118031), (371, 51221), (391, 48601), (901, 21091), (917, 20723), (1219, 15589), (2227, 8533), (2737, 6943), (3013, 6307)]