209938169

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{151}}^1$

素因数の和:381

約数の個数: 32

約数和(自身を含む): 256819200

約数和(自身を除く): 46881031

約数列:

[1, 7, 31, 43, 149, 151, 217, 301, 1043, 1057, 1333, 4619, 4681, 6407, 6493, 9331, 22499, 32333, 32767, 44849, 45451, 157493, 198617, 201283, 697469, 967457, 1390319, 1408981, 4882283, 6772199, 29991167, 209938169]

約数ペア:

[(1, 209938169), (7, 29991167), (31, 6772199), (43, 4882283), (149, 1408981), (151, 1390319), (217, 967457), (301, 697469), (1043, 201283), (1057, 198617), (1333, 157493), (4619, 45451), (4681, 44849), (6407, 32767), (6493, 32333), (9331, 22499)]