21791744

素因数分解:

$2^{10}\times {\mathrm{13}}^1\times {\mathrm{1637}}^1$

素因数の和:1670

約数の個数: 44

約数和(自身を含む): 46941804

約数和(自身を除く): 25150060

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 128, 208, 256, 416, 512, 832, 1024, 1637, 1664, 3274, 3328, 6548, 6656, 13096, 13312, 21281, 26192, 42562, 52384, 85124, 104768, 170248, 209536, 340496, 419072, 680992, 838144, 1361984, 1676288, 2723968, 5447936, 10895872, 21791744]

約数ペア:

[(1, 21791744), (2, 10895872), (4, 5447936), (8, 2723968), (13, 1676288), (16, 1361984), (26, 838144), (32, 680992), (52, 419072), (64, 340496), (104, 209536), (128, 170248), (208, 104768), (256, 85124), (416, 52384), (512, 42562), (832, 26192), (1024, 21281), (1637, 13312), (1664, 13096), (3274, 6656), (3328, 6548)]