81296540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{312679}}^1$

素因数の和:312701

約数の個数: 24

約数和(自身を含む): 183855840

約数和(自身を除く): 102559300

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 312679, 625358, 1250716, 1563395, 3126790, 4064827, 6253580, 8129654, 16259308, 20324135, 40648270, 81296540]

約数ペア:

[(1, 81296540), (2, 40648270), (4, 20324135), (5, 16259308), (10, 8129654), (13, 6253580), (20, 4064827), (26, 3126790), (52, 1563395), (65, 1250716), (130, 625358), (260, 312679)]