20385351

素因数分解:

$3^4\times 7^1\times {\mathrm{157}}^1\times {\mathrm{229}}^1$

素因数の和:405

約数の個数: 40

約数和(自身を含む): 35177120

約数和(自身を除く): 14791769

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 157, 189, 229, 471, 567, 687, 1099, 1413, 1603, 2061, 3297, 4239, 4809, 6183, 9891, 12717, 14427, 18549, 29673, 35953, 43281, 89019, 107859, 129843, 251671, 323577, 755013, 970731, 2265039, 2912193, 6795117, 20385351]

約数ペア:

[(1, 20385351), (3, 6795117), (7, 2912193), (9, 2265039), (21, 970731), (27, 755013), (63, 323577), (81, 251671), (157, 129843), (189, 107859), (229, 89019), (471, 43281), (567, 35953), (687, 29673), (1099, 18549), (1413, 14427), (1603, 12717), (2061, 9891), (3297, 6183), (4239, 4809)]