20713648

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{1117}}^1$

素因数の和:1205

約数の個数: 40

約数和(自身を含む): 42975920

約数和(自身を除く): 22262272

約数列:

[1, 2, 4, 8, 16, 19, 38, 61, 76, 122, 152, 244, 304, 488, 976, 1117, 1159, 2234, 2318, 4468, 4636, 8936, 9272, 17872, 18544, 21223, 42446, 68137, 84892, 136274, 169784, 272548, 339568, 545096, 1090192, 1294603, 2589206, 5178412, 10356824, 20713648]

約数ペア:

[(1, 20713648), (2, 10356824), (4, 5178412), (8, 2589206), (16, 1294603), (19, 1090192), (38, 545096), (61, 339568), (76, 272548), (122, 169784), (152, 136274), (244, 84892), (304, 68137), (488, 42446), (976, 21223), (1117, 18544), (1159, 17872), (2234, 9272), (2318, 8936), (4468, 4636)]