19816888

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{167}}^1$

素因数の和:356

約数の個数: 64

約数和(自身を含む): 46287360

約数和(自身を除く): 26470472

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 163, 167, 182, 326, 334, 364, 652, 668, 728, 1141, 1169, 1304, 1336, 2119, 2171, 2282, 2338, 4238, 4342, 4564, 4676, 8476, 8684, 9128, 9352, 14833, 15197, 16952, 17368, 27221, 29666, 30394, 54442, 59332, 60788, 108884, 118664, 121576, 190547, 217768, 353873, 381094, 707746, 762188, 1415492, 1524376, 2477111, 2830984, 4954222, 9908444, 19816888]

約数ペア:

[(1, 19816888), (2, 9908444), (4, 4954222), (7, 2830984), (8, 2477111), (13, 1524376), (14, 1415492), (26, 762188), (28, 707746), (52, 381094), (56, 353873), (91, 217768), (104, 190547), (163, 121576), (167, 118664), (182, 108884), (326, 60788), (334, 59332), (364, 54442), (652, 30394), (668, 29666), (728, 27221), (1141, 17368), (1169, 16952), (1304, 15197), (1336, 14833), (2119, 9352), (2171, 9128), (2282, 8684), (2338, 8476), (4238, 4676), (4342, 4564)]