21130888

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:182

約数の個数: 64

約数和(自身を含む): 44193600

約数和(自身を除く): 23062712

約数列:

[1, 2, 4, 8, 19, 38, 43, 53, 61, 76, 86, 106, 122, 152, 172, 212, 244, 344, 424, 488, 817, 1007, 1159, 1634, 2014, 2279, 2318, 2623, 3233, 3268, 4028, 4558, 4636, 5246, 6466, 6536, 8056, 9116, 9272, 10492, 12932, 18232, 20984, 25864, 43301, 49837, 61427, 86602, 99674, 122854, 139019, 173204, 199348, 245708, 278038, 346408, 398696, 491416, 556076, 1112152, 2641361, 5282722, 10565444, 21130888]

約数ペア:

[(1, 21130888), (2, 10565444), (4, 5282722), (8, 2641361), (19, 1112152), (38, 556076), (43, 491416), (53, 398696), (61, 346408), (76, 278038), (86, 245708), (106, 199348), (122, 173204), (152, 139019), (172, 122854), (212, 99674), (244, 86602), (344, 61427), (424, 49837), (488, 43301), (817, 25864), (1007, 20984), (1159, 18232), (1634, 12932), (2014, 10492), (2279, 9272), (2318, 9116), (2623, 8056), (3233, 6536), (3268, 6466), (4028, 5246), (4558, 4636)]