21837328

素因数分解:

$2^4\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{409}}^1$

素因数の和:535

約数の個数: 40

約数和(自身を含む): 43925760

約数和(自身を除く): 22088432

約数列:

[1, 2, 4, 8, 16, 47, 71, 94, 142, 188, 284, 376, 409, 568, 752, 818, 1136, 1636, 3272, 3337, 6544, 6674, 13348, 19223, 26696, 29039, 38446, 53392, 58078, 76892, 116156, 153784, 232312, 307568, 464624, 1364833, 2729666, 5459332, 10918664, 21837328]

約数ペア:

[(1, 21837328), (2, 10918664), (4, 5459332), (8, 2729666), (16, 1364833), (47, 464624), (71, 307568), (94, 232312), (142, 153784), (188, 116156), (284, 76892), (376, 58078), (409, 53392), (568, 38446), (752, 29039), (818, 26696), (1136, 19223), (1636, 13348), (3272, 6674), (3337, 6544)]