19986656

素因数分解:

$2^5\times {\mathrm{47}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:291

約数の個数: 48

約数和(自身を含む): 40896576

約数和(自身を除く): 20909920

約数列:

[1, 2, 4, 8, 16, 32, 47, 94, 97, 137, 188, 194, 274, 376, 388, 548, 752, 776, 1096, 1504, 1552, 2192, 3104, 4384, 4559, 6439, 9118, 12878, 13289, 18236, 25756, 26578, 36472, 51512, 53156, 72944, 103024, 106312, 145888, 206048, 212624, 425248, 624583, 1249166, 2498332, 4996664, 9993328, 19986656]

約数ペア:

[(1, 19986656), (2, 9993328), (4, 4996664), (8, 2498332), (16, 1249166), (32, 624583), (47, 425248), (94, 212624), (97, 206048), (137, 145888), (188, 106312), (194, 103024), (274, 72944), (376, 53156), (388, 51512), (548, 36472), (752, 26578), (776, 25756), (1096, 18236), (1504, 13289), (1552, 12878), (2192, 9118), (3104, 6439), (4384, 4559)]