19978998

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{3823}}^1$

素因数の和:3908

約数の個数: 32

約数和(自身を含む): 43685376

約数和(自身を除く): 23706378

約数列:

[1, 2, 3, 6, 13, 26, 39, 67, 78, 134, 201, 402, 871, 1742, 2613, 3823, 5226, 7646, 11469, 22938, 49699, 99398, 149097, 256141, 298194, 512282, 768423, 1536846, 3329833, 6659666, 9989499, 19978998]

約数ペア:

[(1, 19978998), (2, 9989499), (3, 6659666), (6, 3329833), (13, 1536846), (26, 768423), (39, 512282), (67, 298194), (78, 256141), (134, 149097), (201, 99398), (402, 49699), (871, 22938), (1742, 11469), (2613, 7646), (3823, 5226)]