28011920

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{479}}^1$

素因数の和:552

約数の個数: 80

約数和(自身を含む): 70709760

約数和(自身を除く): 42697840

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 43, 68, 80, 85, 86, 136, 170, 172, 215, 272, 340, 344, 430, 479, 680, 688, 731, 860, 958, 1360, 1462, 1720, 1916, 2395, 2924, 3440, 3655, 3832, 4790, 5848, 7310, 7664, 8143, 9580, 11696, 14620, 16286, 19160, 20597, 29240, 32572, 38320, 40715, 41194, 58480, 65144, 81430, 82388, 102985, 130288, 162860, 164776, 205970, 325720, 329552, 350149, 411940, 651440, 700298, 823880, 1400596, 1647760, 1750745, 2801192, 3501490, 5602384, 7002980, 14005960, 28011920]

約数ペア:

[(1, 28011920), (2, 14005960), (4, 7002980), (5, 5602384), (8, 3501490), (10, 2801192), (16, 1750745), (17, 1647760), (20, 1400596), (34, 823880), (40, 700298), (43, 651440), (68, 411940), (80, 350149), (85, 329552), (86, 325720), (136, 205970), (170, 164776), (172, 162860), (215, 130288), (272, 102985), (340, 82388), (344, 81430), (430, 65144), (479, 58480), (680, 41194), (688, 40715), (731, 38320), (860, 32572), (958, 29240), (1360, 20597), (1462, 19160), (1720, 16286), (1916, 14620), (2395, 11696), (2924, 9580), (3440, 8143), (3655, 7664), (3832, 7310), (4790, 5848)]