21617323

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{97}}^1$

素因数の和:227

約数の個数: 32

約数和(自身を含む): 28098560

約数和(自身を除く): 6481237

約数列:

[1, 7, 13, 31, 79, 91, 97, 217, 403, 553, 679, 1027, 1261, 2449, 2821, 3007, 7189, 7663, 8827, 17143, 21049, 31837, 39091, 53641, 99619, 222859, 237553, 273637, 697333, 1662871, 3088189, 21617323]

約数ペア:

[(1, 21617323), (7, 3088189), (13, 1662871), (31, 697333), (79, 273637), (91, 237553), (97, 222859), (217, 99619), (403, 53641), (553, 39091), (679, 31837), (1027, 21049), (1261, 17143), (2449, 8827), (2821, 7663), (3007, 7189)]