20964015

素因数分解:

$3^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{1399}}^1$

素因数の和:1453

約数の個数: 40

約数和(自身を含む): 38623200

約数和(自身を除く): 17659185

約数列:

[1, 3, 5, 9, 15, 27, 37, 45, 81, 111, 135, 185, 333, 405, 555, 999, 1399, 1665, 2997, 4197, 4995, 6995, 12591, 14985, 20985, 37773, 51763, 62955, 113319, 155289, 188865, 258815, 465867, 566595, 776445, 1397601, 2329335, 4192803, 6988005, 20964015]

約数ペア:

[(1, 20964015), (3, 6988005), (5, 4192803), (9, 2329335), (15, 1397601), (27, 776445), (37, 566595), (45, 465867), (81, 258815), (111, 188865), (135, 155289), (185, 113319), (333, 62955), (405, 51763), (555, 37773), (999, 20985), (1399, 14985), (1665, 12591), (2997, 6995), (4197, 4995)]