20727140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{157}}^1$

素因数の和:237

約数の個数: 96

約数和(自身を含む): 53512704

約数和(自身を除く): 32785564

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 41, 46, 70, 82, 92, 115, 140, 157, 161, 164, 205, 230, 287, 314, 322, 410, 460, 574, 628, 644, 785, 805, 820, 943, 1099, 1148, 1435, 1570, 1610, 1886, 2198, 2870, 3140, 3220, 3611, 3772, 4396, 4715, 5495, 5740, 6437, 6601, 7222, 9430, 10990, 12874, 13202, 14444, 18055, 18860, 21980, 25277, 25748, 26404, 32185, 33005, 36110, 45059, 50554, 64370, 66010, 72220, 90118, 101108, 126385, 128740, 132020, 148051, 180236, 225295, 252770, 296102, 450590, 505540, 592204, 740255, 901180, 1036357, 1480510, 2072714, 2961020, 4145428, 5181785, 10363570, 20727140]

約数ペア:

[(1, 20727140), (2, 10363570), (4, 5181785), (5, 4145428), (7, 2961020), (10, 2072714), (14, 1480510), (20, 1036357), (23, 901180), (28, 740255), (35, 592204), (41, 505540), (46, 450590), (70, 296102), (82, 252770), (92, 225295), (115, 180236), (140, 148051), (157, 132020), (161, 128740), (164, 126385), (205, 101108), (230, 90118), (287, 72220), (314, 66010), (322, 64370), (410, 50554), (460, 45059), (574, 36110), (628, 33005), (644, 32185), (785, 26404), (805, 25748), (820, 25277), (943, 21980), (1099, 18860), (1148, 18055), (1435, 14444), (1570, 13202), (1610, 12874), (1886, 10990), (2198, 9430), (2870, 7222), (3140, 6601), (3220, 6437), (3611, 5740), (3772, 5495), (4396, 4715)]