20945985

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{557}}^1$

素因数の和:697

約数の個数: 32

約数和(自身を含む): 35354880

約数和(自身を除く): 14408895

約数列:

[1, 3, 5, 15, 23, 69, 109, 115, 327, 345, 545, 557, 1635, 1671, 2507, 2785, 7521, 8355, 12535, 12811, 37605, 38433, 60713, 64055, 182139, 192165, 303565, 910695, 1396399, 4189197, 6981995, 20945985]

約数ペア:

[(1, 20945985), (3, 6981995), (5, 4189197), (15, 1396399), (23, 910695), (69, 303565), (109, 192165), (115, 182139), (327, 64055), (345, 60713), (545, 38433), (557, 37605), (1635, 12811), (1671, 12535), (2507, 8355), (2785, 7521)]