21510255

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2347}}^1$

素因数の和:2415

約数の個数: 32

約数和(自身を含む): 37868544

約数和(自身を除く): 16358289

約数列:

[1, 3, 5, 13, 15, 39, 47, 65, 141, 195, 235, 611, 705, 1833, 2347, 3055, 7041, 9165, 11735, 30511, 35205, 91533, 110309, 152555, 330927, 457665, 551545, 1434017, 1654635, 4302051, 7170085, 21510255]

約数ペア:

[(1, 21510255), (3, 7170085), (5, 4302051), (13, 1654635), (15, 1434017), (39, 551545), (47, 457665), (65, 330927), (141, 152555), (195, 110309), (235, 91533), (611, 35205), (705, 30511), (1833, 11735), (2347, 9165), (3055, 7041)]