20390958

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{61}}^1\times {\mathrm{379}}^1$

素因数の和:462

約数の個数: 72

約数和(自身を含む): 52373880

約数和(自身を除く): 31982922

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 61, 63, 98, 122, 126, 147, 183, 294, 366, 379, 427, 441, 549, 758, 854, 882, 1098, 1137, 1281, 2274, 2562, 2653, 2989, 3411, 3843, 5306, 5978, 6822, 7686, 7959, 8967, 15918, 17934, 18571, 23119, 23877, 26901, 37142, 46238, 47754, 53802, 55713, 69357, 111426, 138714, 161833, 167139, 208071, 323666, 334278, 416142, 485499, 970998, 1132831, 1456497, 2265662, 2912994, 3398493, 6796986, 10195479, 20390958]

約数ペア:

[(1, 20390958), (2, 10195479), (3, 6796986), (6, 3398493), (7, 2912994), (9, 2265662), (14, 1456497), (18, 1132831), (21, 970998), (42, 485499), (49, 416142), (61, 334278), (63, 323666), (98, 208071), (122, 167139), (126, 161833), (147, 138714), (183, 111426), (294, 69357), (366, 55713), (379, 53802), (427, 47754), (441, 46238), (549, 37142), (758, 26901), (854, 23877), (882, 23119), (1098, 18571), (1137, 17934), (1281, 15918), (2274, 8967), (2562, 7959), (2653, 7686), (2989, 6822), (3411, 5978), (3843, 5306)]