20039908

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{271}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 42649600

約数和(自身を除く): 22609692

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 139, 266, 271, 278, 532, 542, 556, 973, 1084, 1897, 1946, 2641, 3794, 3892, 5149, 5282, 7588, 10298, 10564, 18487, 20596, 36043, 36974, 37669, 72086, 73948, 75338, 144172, 150676, 263683, 527366, 715711, 1054732, 1431422, 2862844, 5009977, 10019954, 20039908]

約数ペア:

[(1, 20039908), (2, 10019954), (4, 5009977), (7, 2862844), (14, 1431422), (19, 1054732), (28, 715711), (38, 527366), (76, 263683), (133, 150676), (139, 144172), (266, 75338), (271, 73948), (278, 72086), (532, 37669), (542, 36974), (556, 36043), (973, 20596), (1084, 18487), (1897, 10564), (1946, 10298), (2641, 7588), (3794, 5282), (3892, 5149)]