18921344

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{137}}^1$

素因数の和:247

約数の個数: 64

約数和(自身を含む): 41383440

約数和(自身を除く): 22462096

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 83, 104, 128, 137, 166, 208, 274, 332, 416, 548, 664, 832, 1079, 1096, 1328, 1664, 1781, 2158, 2192, 2656, 3562, 4316, 4384, 5312, 7124, 8632, 8768, 10624, 11371, 14248, 17264, 17536, 22742, 28496, 34528, 45484, 56992, 69056, 90968, 113984, 138112, 147823, 181936, 227968, 295646, 363872, 591292, 727744, 1182584, 1455488, 2365168, 4730336, 9460672, 18921344]

約数ペア:

[(1, 18921344), (2, 9460672), (4, 4730336), (8, 2365168), (13, 1455488), (16, 1182584), (26, 727744), (32, 591292), (52, 363872), (64, 295646), (83, 227968), (104, 181936), (128, 147823), (137, 138112), (166, 113984), (208, 90968), (274, 69056), (332, 56992), (416, 45484), (548, 34528), (664, 28496), (832, 22742), (1079, 17536), (1096, 17264), (1328, 14248), (1664, 11371), (1781, 10624), (2158, 8768), (2192, 8632), (2656, 7124), (3562, 5312), (4316, 4384)]