20977785

素因数分解:

$3^4\times 5^1\times {\mathrm{51797}}^1$

素因数の和:51814

約数の個数: 20

約数和(自身を含む): 37605348

約数和(自身を除く): 16627563

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51797, 155391, 258985, 466173, 776955, 1398519, 2330865, 4195557, 6992595, 20977785]

約数ペア:

[(1, 20977785), (3, 6992595), (5, 4195557), (9, 2330865), (15, 1398519), (27, 776955), (45, 466173), (81, 258985), (135, 155391), (405, 51797)]