21118515

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{859}}^1$

素因数の和:1027

約数の個数: 32

約数和(自身を含む): 37152000

約数和(自身を除く): 16033485

約数列:

[1, 3, 5, 11, 15, 33, 55, 149, 165, 447, 745, 859, 1639, 2235, 2577, 4295, 4917, 8195, 9449, 12885, 24585, 28347, 47245, 127991, 141735, 383973, 639955, 1407901, 1919865, 4223703, 7039505, 21118515]

約数ペア:

[(1, 21118515), (3, 7039505), (5, 4223703), (11, 1919865), (15, 1407901), (33, 639955), (55, 383973), (149, 141735), (165, 127991), (447, 47245), (745, 28347), (859, 24585), (1639, 12885), (2235, 9449), (2577, 8195), (4295, 4917)]