21564525

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{409}}^1$

素因数の和:478

約数の個数: 48

約数和(自身を含む): 38638400

約数和(自身を除く): 17073875

約数列:

[1, 3, 5, 15, 19, 25, 37, 57, 75, 95, 111, 185, 285, 409, 475, 555, 703, 925, 1227, 1425, 2045, 2109, 2775, 3515, 6135, 7771, 10225, 10545, 15133, 17575, 23313, 30675, 38855, 45399, 52725, 75665, 116565, 194275, 226995, 287527, 378325, 582825, 862581, 1134975, 1437635, 4312905, 7188175, 21564525]

約数ペア:

[(1, 21564525), (3, 7188175), (5, 4312905), (15, 1437635), (19, 1134975), (25, 862581), (37, 582825), (57, 378325), (75, 287527), (95, 226995), (111, 194275), (185, 116565), (285, 75665), (409, 52725), (475, 45399), (555, 38855), (703, 30675), (925, 23313), (1227, 17575), (1425, 15133), (2045, 10545), (2109, 10225), (2775, 7771), (3515, 6135)]