21174545

素因数分解:

$5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{197}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 30336768

約数和(自身を除く): 9162223

約数列:

[1, 5, 7, 35, 37, 83, 185, 197, 259, 415, 581, 985, 1295, 1379, 2905, 3071, 6895, 7289, 15355, 16351, 21497, 36445, 51023, 81755, 107485, 114457, 255115, 572285, 604987, 3024935, 4234909, 21174545]

約数ペア:

[(1, 21174545), (5, 4234909), (7, 3024935), (35, 604987), (37, 572285), (83, 255115), (185, 114457), (197, 107485), (259, 81755), (415, 51023), (581, 36445), (985, 21497), (1295, 16351), (1379, 15355), (2905, 7289), (3071, 6895)]