21817168

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1669}}^1$

素因数の和:1739

約数の個数: 40

約数和(自身を含む): 45557600

約数和(自身を除く): 23740432

約数列:

[1, 2, 4, 8, 16, 19, 38, 43, 76, 86, 152, 172, 304, 344, 688, 817, 1634, 1669, 3268, 3338, 6536, 6676, 13072, 13352, 26704, 31711, 63422, 71767, 126844, 143534, 253688, 287068, 507376, 574136, 1148272, 1363573, 2727146, 5454292, 10908584, 21817168]

約数ペア:

[(1, 21817168), (2, 10908584), (4, 5454292), (8, 2727146), (16, 1363573), (19, 1148272), (38, 574136), (43, 507376), (76, 287068), (86, 253688), (152, 143534), (172, 126844), (304, 71767), (344, 63422), (688, 31711), (817, 26704), (1634, 13352), (1669, 13072), (3268, 6676), (3338, 6536)]