20980978

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{241}}^1$

素因数の和:370

約数の個数: 32

約数和(自身を含む): 34848000

約数和(自身を除く): 13867022

約数列:

[1, 2, 19, 29, 38, 58, 79, 158, 241, 482, 551, 1102, 1501, 2291, 3002, 4579, 4582, 6989, 9158, 13978, 19039, 38078, 43529, 87058, 132791, 265582, 361741, 552131, 723482, 1104262, 10490489, 20980978]

約数ペア:

[(1, 20980978), (2, 10490489), (19, 1104262), (29, 723482), (38, 552131), (58, 361741), (79, 265582), (158, 132791), (241, 87058), (482, 43529), (551, 38078), (1102, 19039), (1501, 13978), (2291, 9158), (3002, 6989), (4579, 4582)]