21080816

素因数分解:

$2^4\times {\mathrm{17}}^2\times {\mathrm{47}}^1\times {\mathrm{97}}^1$

素因数の和:186

約数の個数: 60

約数和(自身を含む): 44767968

約数和(自身を除く): 23687152

約数列:

[1, 2, 4, 8, 16, 17, 34, 47, 68, 94, 97, 136, 188, 194, 272, 289, 376, 388, 578, 752, 776, 799, 1156, 1552, 1598, 1649, 2312, 3196, 3298, 4559, 4624, 6392, 6596, 9118, 12784, 13192, 13583, 18236, 26384, 27166, 28033, 36472, 54332, 56066, 72944, 77503, 108664, 112132, 155006, 217328, 224264, 310012, 448528, 620024, 1240048, 1317551, 2635102, 5270204, 10540408, 21080816]

約数ペア:

[(1, 21080816), (2, 10540408), (4, 5270204), (8, 2635102), (16, 1317551), (17, 1240048), (34, 620024), (47, 448528), (68, 310012), (94, 224264), (97, 217328), (136, 155006), (188, 112132), (194, 108664), (272, 77503), (289, 72944), (376, 56066), (388, 54332), (578, 36472), (752, 28033), (776, 27166), (799, 26384), (1156, 18236), (1552, 13583), (1598, 13192), (1649, 12784), (2312, 9118), (3196, 6596), (3298, 6392), (4559, 4624)]