21983157

素因数分解:

$3^4\times 7^1\times {\mathrm{137}}^1\times {\mathrm{283}}^1$

素因数の和:439

約数の個数: 40

約数和(自身を含む): 37937856

約数和(自身を除く): 15954699

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 137, 189, 283, 411, 567, 849, 959, 1233, 1981, 2547, 2877, 3699, 5943, 7641, 8631, 11097, 17829, 22923, 25893, 38771, 53487, 77679, 116313, 160461, 271397, 348939, 814191, 1046817, 2442573, 3140451, 7327719, 21983157]

約数ペア:

[(1, 21983157), (3, 7327719), (7, 3140451), (9, 2442573), (21, 1046817), (27, 814191), (63, 348939), (81, 271397), (137, 160461), (189, 116313), (283, 77679), (411, 53487), (567, 38771), (849, 25893), (959, 22923), (1233, 17829), (1981, 11097), (2547, 8631), (2877, 7641), (3699, 5943)]