20884240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{467}}^1$

素因数の和:536

約数の個数: 80

約数和(自身を含む): 53621568

約数和(自身を除く): 32737328

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 43, 52, 65, 80, 86, 104, 130, 172, 208, 215, 260, 344, 430, 467, 520, 559, 688, 860, 934, 1040, 1118, 1720, 1868, 2236, 2335, 2795, 3440, 3736, 4472, 4670, 5590, 6071, 7472, 8944, 9340, 11180, 12142, 18680, 20081, 22360, 24284, 30355, 37360, 40162, 44720, 48568, 60710, 80324, 97136, 100405, 121420, 160648, 200810, 242840, 261053, 321296, 401620, 485680, 522106, 803240, 1044212, 1305265, 1606480, 2088424, 2610530, 4176848, 5221060, 10442120, 20884240]

約数ペア:

[(1, 20884240), (2, 10442120), (4, 5221060), (5, 4176848), (8, 2610530), (10, 2088424), (13, 1606480), (16, 1305265), (20, 1044212), (26, 803240), (40, 522106), (43, 485680), (52, 401620), (65, 321296), (80, 261053), (86, 242840), (104, 200810), (130, 160648), (172, 121420), (208, 100405), (215, 97136), (260, 80324), (344, 60710), (430, 48568), (467, 44720), (520, 40162), (559, 37360), (688, 30355), (860, 24284), (934, 22360), (1040, 20081), (1118, 18680), (1720, 12142), (1868, 11180), (2236, 9340), (2335, 8944), (2795, 7472), (3440, 6071), (3736, 5590), (4472, 4670)]