21116975

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{4517}}^1$

素因数の和:4555

約数の個数: 24

約数和(自身を含む): 30252528

約数和(自身を除く): 9135553

約数列:

[1, 5, 11, 17, 25, 55, 85, 187, 275, 425, 935, 4517, 4675, 22585, 49687, 76789, 112925, 248435, 383945, 844679, 1242175, 1919725, 4223395, 21116975]

約数ペア:

[(1, 21116975), (5, 4223395), (11, 1919725), (17, 1242175), (25, 844679), (55, 383945), (85, 248435), (187, 112925), (275, 76789), (425, 49687), (935, 22585), (4517, 4675)]