20921931

素因数分解:

$3^2\times {\mathrm{31}}^2\times {\mathrm{41}}^1\times {\mathrm{59}}^1$

素因数の和:168

約数の個数: 36

約数和(自身を含む): 32530680

約数和(自身を除く): 11608749

約数列:

[1, 3, 9, 31, 41, 59, 93, 123, 177, 279, 369, 531, 961, 1271, 1829, 2419, 2883, 3813, 5487, 7257, 8649, 11439, 16461, 21771, 39401, 56699, 74989, 118203, 170097, 224967, 354609, 510291, 674901, 2324659, 6973977, 20921931]

約数ペア:

[(1, 20921931), (3, 6973977), (9, 2324659), (31, 674901), (41, 510291), (59, 354609), (93, 224967), (123, 170097), (177, 118203), (279, 74989), (369, 56699), (531, 39401), (961, 21771), (1271, 16461), (1829, 11439), (2419, 8649), (2883, 7257), (3813, 5487)]