18789988

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{163}}^1\times {\mathrm{179}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 39674880

約数和(自身を除く): 20884892

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 163, 179, 322, 326, 358, 644, 652, 716, 1141, 1253, 2282, 2506, 3749, 4117, 4564, 5012, 7498, 8234, 14996, 16468, 26243, 28819, 29177, 52486, 57638, 58354, 104972, 115276, 116708, 204239, 408478, 671071, 816956, 1342142, 2684284, 4697497, 9394994, 18789988]

約数ペア:

[(1, 18789988), (2, 9394994), (4, 4697497), (7, 2684284), (14, 1342142), (23, 816956), (28, 671071), (46, 408478), (92, 204239), (161, 116708), (163, 115276), (179, 104972), (322, 58354), (326, 57638), (358, 52486), (644, 29177), (652, 28819), (716, 26243), (1141, 16468), (1253, 14996), (2282, 8234), (2506, 7498), (3749, 5012), (4117, 4564)]