21507135

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{2081}}^1$

素因数の和:2155

約数の個数: 32

約数和(自身を含む): 37775808

約数和(自身を除く): 16268673

約数列:

[1, 3, 5, 13, 15, 39, 53, 65, 159, 195, 265, 689, 795, 2067, 2081, 3445, 6243, 10335, 10405, 27053, 31215, 81159, 110293, 135265, 330879, 405795, 551465, 1433809, 1654395, 4301427, 7169045, 21507135]

約数ペア:

[(1, 21507135), (3, 7169045), (5, 4301427), (13, 1654395), (15, 1433809), (39, 551465), (53, 405795), (65, 330879), (159, 135265), (195, 110293), (265, 81159), (689, 31215), (795, 27053), (2067, 10405), (2081, 10335), (3445, 6243)]