21977085

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{2621}}^1$

素因数の和:2685

約数の個数: 32

約数和(自身を含む): 38763648

約数和(自身を除く): 16786563

約数列:

[1, 3, 5, 13, 15, 39, 43, 65, 129, 195, 215, 559, 645, 1677, 2621, 2795, 7863, 8385, 13105, 34073, 39315, 102219, 112703, 170365, 338109, 511095, 563515, 1465139, 1690545, 4395417, 7325695, 21977085]

約数ペア:

[(1, 21977085), (3, 7325695), (5, 4395417), (13, 1690545), (15, 1465139), (39, 563515), (43, 511095), (65, 338109), (129, 170365), (195, 112703), (215, 102219), (559, 39315), (645, 34073), (1677, 13105), (2621, 8385), (2795, 7863)]