21810575

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:156

約数の個数: 48

約数和(自身を含む): 31381920

約数和(自身を除く): 9571345

約数列:

[1, 5, 17, 19, 25, 37, 73, 85, 95, 185, 323, 365, 425, 475, 629, 703, 925, 1241, 1387, 1615, 1825, 2701, 3145, 3515, 6205, 6935, 8075, 11951, 13505, 15725, 17575, 23579, 31025, 34675, 45917, 51319, 59755, 67525, 117895, 229585, 256595, 298775, 589475, 872423, 1147925, 1282975, 4362115, 21810575]

約数ペア:

[(1, 21810575), (5, 4362115), (17, 1282975), (19, 1147925), (25, 872423), (37, 589475), (73, 298775), (85, 256595), (95, 229585), (185, 117895), (323, 67525), (365, 59755), (425, 51319), (475, 45917), (629, 34675), (703, 31025), (925, 23579), (1241, 17575), (1387, 15725), (1615, 13505), (1825, 11951), (2701, 8075), (3145, 6935), (3515, 6205)]