18931328

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{367}}^1$

素因数の和:425

約数の個数: 64

約数和(自身を含む): 42040320

約数和(自身を除く): 23108992

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 32, 52, 62, 64, 104, 124, 128, 208, 248, 367, 403, 416, 496, 734, 806, 832, 992, 1468, 1612, 1664, 1984, 2936, 3224, 3968, 4771, 5872, 6448, 9542, 11377, 11744, 12896, 19084, 22754, 23488, 25792, 38168, 45508, 46976, 51584, 76336, 91016, 147901, 152672, 182032, 295802, 305344, 364064, 591604, 610688, 728128, 1183208, 1456256, 2366416, 4732832, 9465664, 18931328]

約数ペア:

[(1, 18931328), (2, 9465664), (4, 4732832), (8, 2366416), (13, 1456256), (16, 1183208), (26, 728128), (31, 610688), (32, 591604), (52, 364064), (62, 305344), (64, 295802), (104, 182032), (124, 152672), (128, 147901), (208, 91016), (248, 76336), (367, 51584), (403, 46976), (416, 45508), (496, 38168), (734, 25792), (806, 23488), (832, 22754), (992, 19084), (1468, 12896), (1612, 11744), (1664, 11377), (1984, 9542), (2936, 6448), (3224, 5872), (3968, 4771)]