21885280

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{3181}}^1$

素因数の和:3239

約数の個数: 48

約数和(自身を含む): 52923024

約数和(自身を除く): 31037744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 160, 172, 215, 344, 430, 688, 860, 1376, 1720, 3181, 3440, 6362, 6880, 12724, 15905, 25448, 31810, 50896, 63620, 101792, 127240, 136783, 254480, 273566, 508960, 547132, 683915, 1094264, 1367830, 2188528, 2735660, 4377056, 5471320, 10942640, 21885280]

約数ペア:

[(1, 21885280), (2, 10942640), (4, 5471320), (5, 4377056), (8, 2735660), (10, 2188528), (16, 1367830), (20, 1094264), (32, 683915), (40, 547132), (43, 508960), (80, 273566), (86, 254480), (160, 136783), (172, 127240), (215, 101792), (344, 63620), (430, 50896), (688, 31810), (860, 25448), (1376, 15905), (1720, 12724), (3181, 6880), (3440, 6362)]