21123115

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{8783}}^1$

素因数の和:8838

約数の個数: 16

約数和(自身を含む): 28038528

約数和(自身を除く): 6915413

約数列:

[1, 5, 13, 37, 65, 185, 481, 2405, 8783, 43915, 114179, 324971, 570895, 1624855, 4224623, 21123115]

約数ペア:

[(1, 21123115), (5, 4224623), (13, 1624855), (37, 570895), (65, 324971), (185, 114179), (481, 43915), (2405, 8783)]