21740168

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{839}}^1$

素因数の和:965

約数の個数: 32

約数和(自身を含む): 42336000

約数和(自身を除く): 20595832

約数列:

[1, 2, 4, 8, 41, 79, 82, 158, 164, 316, 328, 632, 839, 1678, 3239, 3356, 6478, 6712, 12956, 25912, 34399, 66281, 68798, 132562, 137596, 265124, 275192, 530248, 2717521, 5435042, 10870084, 21740168]

約数ペア:

[(1, 21740168), (2, 10870084), (4, 5435042), (8, 2717521), (41, 530248), (79, 275192), (82, 265124), (158, 137596), (164, 132562), (316, 68798), (328, 66281), (632, 34399), (839, 25912), (1678, 12956), (3239, 6712), (3356, 6478)]