18997328

素因数分解:

$2^4\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2389}}^1$

素因数の和:2475

約数の個数: 40

約数和(自身を含む): 42675840

約数和(自身を除く): 23678512

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 71, 112, 142, 284, 497, 568, 994, 1136, 1988, 2389, 3976, 4778, 7952, 9556, 16723, 19112, 33446, 38224, 66892, 133784, 169619, 267568, 339238, 678476, 1187333, 1356952, 2374666, 2713904, 4749332, 9498664, 18997328]

約数ペア:

[(1, 18997328), (2, 9498664), (4, 4749332), (7, 2713904), (8, 2374666), (14, 1356952), (16, 1187333), (28, 678476), (56, 339238), (71, 267568), (112, 169619), (142, 133784), (284, 66892), (497, 38224), (568, 33446), (994, 19112), (1136, 16723), (1988, 9556), (2389, 7952), (3976, 4778)]