18994820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1699}}^1$

素因数の和:1764

約数の個数: 48

約数和(自身を含む): 43982400

約数和(自身を除く): 24987580

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 43, 52, 65, 86, 130, 172, 215, 260, 430, 559, 860, 1118, 1699, 2236, 2795, 3398, 5590, 6796, 8495, 11180, 16990, 22087, 33980, 44174, 73057, 88348, 110435, 146114, 220870, 292228, 365285, 441740, 730570, 949741, 1461140, 1899482, 3798964, 4748705, 9497410, 18994820]

約数ペア:

[(1, 18994820), (2, 9497410), (4, 4748705), (5, 3798964), (10, 1899482), (13, 1461140), (20, 949741), (26, 730570), (43, 441740), (52, 365285), (65, 292228), (86, 220870), (130, 146114), (172, 110435), (215, 88348), (260, 73057), (430, 44174), (559, 33980), (860, 22087), (1118, 16990), (1699, 11180), (2236, 8495), (2795, 6796), (3398, 5590)]