21405735

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{12197}}^1$

素因数の和:12224

約数の個数: 32

約数和(自身を含む): 40985280

約数和(自身を除く): 19579545

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 117, 135, 195, 351, 585, 1755, 12197, 36591, 60985, 109773, 158561, 182955, 329319, 475683, 548865, 792805, 1427049, 1646595, 2378415, 4281147, 7135245, 21405735]

約数ペア:

[(1, 21405735), (3, 7135245), (5, 4281147), (9, 2378415), (13, 1646595), (15, 1427049), (27, 792805), (39, 548865), (45, 475683), (65, 329319), (117, 182955), (135, 158561), (195, 109773), (351, 60985), (585, 36591), (1755, 12197)]