261861271

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{229}}^1$

素因数の和:439

約数の個数: 32

約数和(自身を含む): 320601600

約数和(自身を除く): 58740329

約数列:

[1, 7, 29, 43, 131, 203, 229, 301, 917, 1247, 1603, 3799, 5633, 6641, 8729, 9847, 26593, 29999, 39431, 46487, 68929, 163357, 209993, 285563, 869971, 1143499, 1289957, 1998941, 6089797, 9029699, 37408753, 261861271]

約数ペア:

[(1, 261861271), (7, 37408753), (29, 9029699), (43, 6089797), (131, 1998941), (203, 1289957), (229, 1143499), (301, 869971), (917, 285563), (1247, 209993), (1603, 163357), (3799, 68929), (5633, 46487), (6641, 39431), (8729, 29999), (9847, 26593)]