20704385

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{457}}^1$

素因数の和:533

約数の個数: 32

約数和(自身を含む): 29084832

約数和(自身を除く): 8380447

約数列:

[1, 5, 13, 17, 41, 65, 85, 205, 221, 457, 533, 697, 1105, 2285, 2665, 3485, 5941, 7769, 9061, 18737, 29705, 38845, 45305, 93685, 100997, 243581, 318529, 504985, 1217905, 1592645, 4140877, 20704385]

約数ペア:

[(1, 20704385), (5, 4140877), (13, 1592645), (17, 1217905), (41, 504985), (65, 318529), (85, 243581), (205, 100997), (221, 93685), (457, 45305), (533, 38845), (697, 29705), (1105, 18737), (2285, 9061), (2665, 7769), (3485, 5941)]