18720051

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{521}}^1$

素因数の和:619

約数の個数: 32

約数和(自身を含む): 30067200

約数和(自身を除く): 11347149

約数列:

[1, 3, 7, 21, 29, 59, 87, 177, 203, 413, 521, 609, 1239, 1563, 1711, 3647, 5133, 10941, 11977, 15109, 30739, 35931, 45327, 92217, 105763, 215173, 317289, 645519, 891431, 2674293, 6240017, 18720051]

約数ペア:

[(1, 18720051), (3, 6240017), (7, 2674293), (21, 891431), (29, 645519), (59, 317289), (87, 215173), (177, 105763), (203, 92217), (413, 45327), (521, 35931), (609, 30739), (1239, 15109), (1563, 11977), (1711, 10941), (3647, 5133)]