21686415

素因数分解:

$3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1\times {\mathrm{173}}^1$

素因数の和:379

約数の個数: 32

約数和(自身を含む): 35729856

約数和(自身を除く): 14043441

約数列:

[1, 3, 5, 15, 61, 137, 173, 183, 305, 411, 519, 685, 865, 915, 2055, 2595, 8357, 10553, 23701, 25071, 31659, 41785, 52765, 71103, 118505, 125355, 158295, 355515, 1445761, 4337283, 7228805, 21686415]

約数ペア:

[(1, 21686415), (3, 7228805), (5, 4337283), (15, 1445761), (61, 355515), (137, 158295), (173, 125355), (183, 118505), (305, 71103), (411, 52765), (519, 41785), (685, 31659), (865, 25071), (915, 23701), (2055, 10553), (2595, 8357)]