18918512

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{509}}^1$

素因数の和:641

約数の個数: 40

約数和(自身を含む): 38702880

約数和(自身を除く): 19784368

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 101, 184, 202, 368, 404, 509, 808, 1018, 1616, 2036, 2323, 4072, 4646, 8144, 9292, 11707, 18584, 23414, 37168, 46828, 51409, 93656, 102818, 187312, 205636, 411272, 822544, 1182407, 2364814, 4729628, 9459256, 18918512]

約数ペア:

[(1, 18918512), (2, 9459256), (4, 4729628), (8, 2364814), (16, 1182407), (23, 822544), (46, 411272), (92, 205636), (101, 187312), (184, 102818), (202, 93656), (368, 51409), (404, 46828), (509, 37168), (808, 23414), (1018, 18584), (1616, 11707), (2036, 9292), (2323, 8144), (4072, 4646)]