21196685

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 7315315

約数列:

[1, 5, 19, 23, 89, 95, 109, 115, 437, 445, 545, 1691, 2047, 2071, 2185, 2507, 8455, 9701, 10235, 10355, 12535, 38893, 47633, 48505, 184319, 194465, 223123, 238165, 921595, 1115615, 4239337, 21196685]

約数ペア:

[(1, 21196685), (5, 4239337), (19, 1115615), (23, 921595), (89, 238165), (95, 223123), (109, 194465), (115, 184319), (437, 48505), (445, 47633), (545, 38893), (1691, 12535), (2047, 10355), (2071, 10235), (2185, 9701), (2507, 8455)]