20438072

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:180

約数の個数: 64

約数和(自身を含む): 42768000

約数和(自身を除く): 22329928

約数列:

[1, 2, 4, 8, 19, 38, 43, 53, 59, 76, 86, 106, 118, 152, 172, 212, 236, 344, 424, 472, 817, 1007, 1121, 1634, 2014, 2242, 2279, 2537, 3127, 3268, 4028, 4484, 4558, 5074, 6254, 6536, 8056, 8968, 9116, 10148, 12508, 18232, 20296, 25016, 43301, 48203, 59413, 86602, 96406, 118826, 134461, 173204, 192812, 237652, 268922, 346408, 385624, 475304, 537844, 1075688, 2554759, 5109518, 10219036, 20438072]

約数ペア:

[(1, 20438072), (2, 10219036), (4, 5109518), (8, 2554759), (19, 1075688), (38, 537844), (43, 475304), (53, 385624), (59, 346408), (76, 268922), (86, 237652), (106, 192812), (118, 173204), (152, 134461), (172, 118826), (212, 96406), (236, 86602), (344, 59413), (424, 48203), (472, 43301), (817, 25016), (1007, 20296), (1121, 18232), (1634, 12508), (2014, 10148), (2242, 9116), (2279, 8968), (2537, 8056), (3127, 6536), (3268, 6254), (4028, 5074), (4484, 4558)]