21257236

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{5309}}^1$

素因数の和:5344

約数の個数: 48

約数和(自身を含む): 49956480

約数和(自身を除く): 28699244

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 143, 154, 182, 286, 308, 364, 572, 1001, 2002, 4004, 5309, 10618, 21236, 37163, 58399, 69017, 74326, 116798, 138034, 148652, 233596, 276068, 408793, 483119, 759187, 817586, 966238, 1518374, 1635172, 1932476, 3036748, 5314309, 10628618, 21257236]

約数ペア:

[(1, 21257236), (2, 10628618), (4, 5314309), (7, 3036748), (11, 1932476), (13, 1635172), (14, 1518374), (22, 966238), (26, 817586), (28, 759187), (44, 483119), (52, 408793), (77, 276068), (91, 233596), (143, 148652), (154, 138034), (182, 116798), (286, 74326), (308, 69017), (364, 58399), (572, 37163), (1001, 21236), (2002, 10618), (4004, 5309)]