18856880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{223}}^1$

素因数の和:394

約数の個数: 80

約数和(自身を含む): 50663424

約数和(自身を除く): 31806544

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 151, 223, 280, 302, 446, 560, 604, 755, 892, 1057, 1115, 1208, 1510, 1561, 1784, 2114, 2230, 2416, 3020, 3122, 3568, 4228, 4460, 5285, 6040, 6244, 7805, 8456, 8920, 10570, 12080, 12488, 15610, 16912, 17840, 21140, 24976, 31220, 33673, 42280, 62440, 67346, 84560, 124880, 134692, 168365, 235711, 269384, 336730, 471422, 538768, 673460, 942844, 1178555, 1346920, 1885688, 2357110, 2693840, 3771376, 4714220, 9428440, 18856880]

約数ペア:

[(1, 18856880), (2, 9428440), (4, 4714220), (5, 3771376), (7, 2693840), (8, 2357110), (10, 1885688), (14, 1346920), (16, 1178555), (20, 942844), (28, 673460), (35, 538768), (40, 471422), (56, 336730), (70, 269384), (80, 235711), (112, 168365), (140, 134692), (151, 124880), (223, 84560), (280, 67346), (302, 62440), (446, 42280), (560, 33673), (604, 31220), (755, 24976), (892, 21140), (1057, 17840), (1115, 16912), (1208, 15610), (1510, 12488), (1561, 12080), (1784, 10570), (2114, 8920), (2230, 8456), (2416, 7805), (3020, 6244), (3122, 6040), (3568, 5285), (4228, 4460)]