21117988

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{2081}}^1$

素因数の和:2187

約数の個数: 24

約数和(自身を含む): 38475360

約数和(自身を除く): 17357372

約数列:

[1, 2, 4, 43, 59, 86, 118, 172, 236, 2081, 2537, 4162, 5074, 8324, 10148, 89483, 122779, 178966, 245558, 357932, 491116, 5279497, 10558994, 21117988]

約数ペア:

[(1, 21117988), (2, 10558994), (4, 5279497), (43, 491116), (59, 357932), (86, 245558), (118, 178966), (172, 122779), (236, 89483), (2081, 10148), (2537, 8324), (4162, 5074)]