18947864

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{223}}^1$

素因数の和:304

約数の個数: 64

約数和(自身を含む): 41395200

約数和(自身を除く): 22447336

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 43, 52, 76, 86, 104, 152, 172, 223, 247, 344, 446, 494, 559, 817, 892, 988, 1118, 1634, 1784, 1976, 2236, 2899, 3268, 4237, 4472, 5798, 6536, 8474, 9589, 10621, 11596, 16948, 19178, 21242, 23192, 33896, 38356, 42484, 55081, 76712, 84968, 110162, 124657, 182191, 220324, 249314, 364382, 440648, 498628, 728764, 997256, 1457528, 2368483, 4736966, 9473932, 18947864]

約数ペア:

[(1, 18947864), (2, 9473932), (4, 4736966), (8, 2368483), (13, 1457528), (19, 997256), (26, 728764), (38, 498628), (43, 440648), (52, 364382), (76, 249314), (86, 220324), (104, 182191), (152, 124657), (172, 110162), (223, 84968), (247, 76712), (344, 55081), (446, 42484), (494, 38356), (559, 33896), (817, 23192), (892, 21242), (988, 19178), (1118, 16948), (1634, 11596), (1784, 10621), (1976, 9589), (2236, 8474), (2899, 6536), (3268, 5798), (4237, 4472)]