21175713

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^2$

素因数の和:206

約数の個数: 36

約数和(自身を含む): 34512660

約数和(自身を除く): 13336947

約数列:

[1, 3, 9, 13, 29, 39, 79, 87, 117, 237, 261, 377, 711, 1027, 1131, 2291, 3081, 3393, 6241, 6873, 9243, 18723, 20619, 29783, 56169, 81133, 89349, 180989, 243399, 268047, 542967, 730197, 1628901, 2352857, 7058571, 21175713]

約数ペア:

[(1, 21175713), (3, 7058571), (9, 2352857), (13, 1628901), (29, 730197), (39, 542967), (79, 268047), (87, 243399), (117, 180989), (237, 89349), (261, 81133), (377, 56169), (711, 29783), (1027, 20619), (1131, 18723), (2291, 9243), (3081, 6873), (3393, 6241)]