81304340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312709}}^1$

素因数の和:312731

約数の個数: 24

約数和(自身を含む): 183873480

約数和(自身を除く): 102569140

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312709, 625418, 1250836, 1563545, 3127090, 4065217, 6254180, 8130434, 16260868, 20326085, 40652170, 81304340]

約数ペア:

[(1, 81304340), (2, 40652170), (4, 20326085), (5, 16260868), (10, 8130434), (13, 6254180), (20, 4065217), (26, 3127090), (52, 1563545), (65, 1250836), (130, 625418), (260, 312709)]