19911969

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{487}}^1$

素因数の和:570

約数の個数: 48

約数和(自身を含む): 36541440

約数和(自身を除く): 16629471

約数列:

[1, 3, 7, 9, 11, 21, 33, 59, 63, 77, 99, 177, 231, 413, 487, 531, 649, 693, 1239, 1461, 1947, 3409, 3717, 4383, 4543, 5357, 5841, 10227, 13629, 16071, 28733, 30681, 37499, 40887, 48213, 86199, 112497, 201131, 258597, 316063, 337491, 603393, 948189, 1810179, 2212441, 2844567, 6637323, 19911969]

約数ペア:

[(1, 19911969), (3, 6637323), (7, 2844567), (9, 2212441), (11, 1810179), (21, 948189), (33, 603393), (59, 337491), (63, 316063), (77, 258597), (99, 201131), (177, 112497), (231, 86199), (413, 48213), (487, 40887), (531, 37499), (649, 30681), (693, 28733), (1239, 16071), (1461, 13629), (1947, 10227), (3409, 5841), (3717, 5357), (4383, 4543)]