19801551

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{3727}}^1$

素因数の和:3771

約数の個数: 32

約数和(自身を含む): 34357248

約数和(自身を除く): 14555697

約数列:

[1, 3, 7, 11, 21, 23, 33, 69, 77, 161, 231, 253, 483, 759, 1771, 3727, 5313, 11181, 26089, 40997, 78267, 85721, 122991, 257163, 286979, 600047, 860937, 942931, 1800141, 2828793, 6600517, 19801551]

約数ペア:

[(1, 19801551), (3, 6600517), (7, 2828793), (11, 1800141), (21, 942931), (23, 860937), (33, 600047), (69, 286979), (77, 257163), (161, 122991), (231, 85721), (253, 78267), (483, 40997), (759, 26089), (1771, 11181), (3727, 5313)]