20872431

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:141

約数の個数: 64

約数和(自身を含む): 35712000

約数和(自身を除く): 14839569

約数列:

[1, 3, 9, 19, 23, 27, 29, 57, 61, 69, 87, 171, 183, 207, 261, 437, 513, 549, 551, 621, 667, 783, 1159, 1311, 1403, 1647, 1653, 1769, 2001, 3477, 3933, 4209, 4959, 5307, 6003, 10431, 11799, 12627, 12673, 14877, 15921, 18009, 26657, 31293, 33611, 37881, 38019, 40687, 47763, 79971, 100833, 114057, 122061, 239913, 302499, 342171, 366183, 719739, 773053, 907497, 1098549, 2319159, 6957477, 20872431]

約数ペア:

[(1, 20872431), (3, 6957477), (9, 2319159), (19, 1098549), (23, 907497), (27, 773053), (29, 719739), (57, 366183), (61, 342171), (69, 302499), (87, 239913), (171, 122061), (183, 114057), (207, 100833), (261, 79971), (437, 47763), (513, 40687), (549, 38019), (551, 37881), (621, 33611), (667, 31293), (783, 26657), (1159, 18009), (1311, 15921), (1403, 14877), (1647, 12673), (1653, 12627), (1769, 11799), (2001, 10431), (3477, 6003), (3933, 5307), (4209, 4959)]