21660304

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1657}}^1$

素因数の和:1727

約数の個数: 40

約数和(自身を含む): 45230240

約数和(自身を除く): 23569936

約数列:

[1, 2, 4, 8, 16, 19, 38, 43, 76, 86, 152, 172, 304, 344, 688, 817, 1634, 1657, 3268, 3314, 6536, 6628, 13072, 13256, 26512, 31483, 62966, 71251, 125932, 142502, 251864, 285004, 503728, 570008, 1140016, 1353769, 2707538, 5415076, 10830152, 21660304]

約数ペア:

[(1, 21660304), (2, 10830152), (4, 5415076), (8, 2707538), (16, 1353769), (19, 1140016), (38, 570008), (43, 503728), (76, 285004), (86, 251864), (152, 142502), (172, 125932), (304, 71251), (344, 62966), (688, 31483), (817, 26512), (1634, 13256), (1657, 13072), (3268, 6628), (3314, 6536)]