20743515

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{601}}^1$

素因数の和:684

約数の個数: 48

約数和(自身を含む): 39443040

約数和(自身を除く): 18699525

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 59, 65, 117, 177, 195, 295, 531, 585, 601, 767, 885, 1803, 2301, 2655, 3005, 3835, 5409, 6903, 7813, 9015, 11505, 23439, 27045, 34515, 35459, 39065, 70317, 106377, 117195, 177295, 319131, 351585, 460967, 531885, 1382901, 1595655, 2304835, 4148703, 6914505, 20743515]

約数ペア:

[(1, 20743515), (3, 6914505), (5, 4148703), (9, 2304835), (13, 1595655), (15, 1382901), (39, 531885), (45, 460967), (59, 351585), (65, 319131), (117, 177295), (177, 117195), (195, 106377), (295, 70317), (531, 39065), (585, 35459), (601, 34515), (767, 27045), (885, 23439), (1803, 11505), (2301, 9015), (2655, 7813), (3005, 6903), (3835, 5409)]