20784591

素因数分解:

$3^2\times {\mathrm{17}}^2\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:232

約数の個数: 36

約数和(自身を含む): 32662344

約数和(自身を除く): 11877753

約数列:

[1, 3, 9, 17, 51, 61, 131, 153, 183, 289, 393, 549, 867, 1037, 1179, 2227, 2601, 3111, 6681, 7991, 9333, 17629, 20043, 23973, 37859, 52887, 71919, 113577, 135847, 158661, 340731, 407541, 1222623, 2309399, 6928197, 20784591]

約数ペア:

[(1, 20784591), (3, 6928197), (9, 2309399), (17, 1222623), (51, 407541), (61, 340731), (131, 158661), (153, 135847), (183, 113577), (289, 71919), (393, 52887), (549, 37859), (867, 23973), (1037, 20043), (1179, 17629), (2227, 9333), (2601, 7991), (3111, 6681)]