21259264

素因数分解:

$2^{10}\times {\mathrm{13}}^1\times {\mathrm{1597}}^1$

素因数の和:1630

約数の個数: 44

約数和(自身を含む): 45795484

約数和(自身を除く): 24536220

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 128, 208, 256, 416, 512, 832, 1024, 1597, 1664, 3194, 3328, 6388, 6656, 12776, 13312, 20761, 25552, 41522, 51104, 83044, 102208, 166088, 204416, 332176, 408832, 664352, 817664, 1328704, 1635328, 2657408, 5314816, 10629632, 21259264]

約数ペア:

[(1, 21259264), (2, 10629632), (4, 5314816), (8, 2657408), (13, 1635328), (16, 1328704), (26, 817664), (32, 664352), (52, 408832), (64, 332176), (104, 204416), (128, 166088), (208, 102208), (256, 83044), (416, 51104), (512, 41522), (832, 25552), (1024, 20761), (1597, 13312), (1664, 12776), (3194, 6656), (3328, 6388)]