21571552

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:371

約数の個数: 48

約数和(自身を含む): 44340912

約数和(自身を除く): 22769360

約数列:

[1, 2, 4, 8, 16, 32, 43, 61, 86, 122, 172, 244, 257, 344, 488, 514, 688, 976, 1028, 1376, 1952, 2056, 2623, 4112, 5246, 8224, 10492, 11051, 15677, 20984, 22102, 31354, 41968, 44204, 62708, 83936, 88408, 125416, 176816, 250832, 353632, 501664, 674111, 1348222, 2696444, 5392888, 10785776, 21571552]

約数ペア:

[(1, 21571552), (2, 10785776), (4, 5392888), (8, 2696444), (16, 1348222), (32, 674111), (43, 501664), (61, 353632), (86, 250832), (122, 176816), (172, 125416), (244, 88408), (257, 83936), (344, 62708), (488, 44204), (514, 41968), (688, 31354), (976, 22102), (1028, 20984), (1376, 15677), (1952, 11051), (2056, 10492), (2623, 8224), (4112, 5246)]