261640407

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{7043}}^1$

素因数の和:7143

約数の個数: 32

約数和(自身を含む): 419258880

約数和(自身を除く): 157618473

約数列:

[1, 3, 7, 21, 29, 61, 87, 183, 203, 427, 609, 1281, 1769, 5307, 7043, 12383, 21129, 37149, 49301, 147903, 204247, 429623, 612741, 1288869, 1429729, 3007361, 4289187, 9022083, 12459067, 37377201, 87213469, 261640407]

約数ペア:

[(1, 261640407), (3, 87213469), (7, 37377201), (21, 12459067), (29, 9022083), (61, 4289187), (87, 3007361), (183, 1429729), (203, 1288869), (427, 612741), (609, 429623), (1281, 204247), (1769, 147903), (5307, 49301), (7043, 37149), (12383, 21129)]