21595761

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:171

約数の個数: 64

約数和(自身を含む): 38016000

約数和(自身を除く): 16420239

約数列:

[1, 3, 9, 11, 19, 27, 33, 43, 57, 89, 99, 129, 171, 209, 267, 297, 387, 473, 513, 627, 801, 817, 979, 1161, 1419, 1691, 1881, 2403, 2451, 2937, 3827, 4257, 5073, 5643, 7353, 8811, 8987, 11481, 12771, 15219, 18601, 22059, 26433, 26961, 34443, 42097, 45657, 55803, 72713, 80883, 103329, 126291, 167409, 218139, 242649, 378873, 502227, 654417, 799843, 1136619, 1963251, 2399529, 7198587, 21595761]

約数ペア:

[(1, 21595761), (3, 7198587), (9, 2399529), (11, 1963251), (19, 1136619), (27, 799843), (33, 654417), (43, 502227), (57, 378873), (89, 242649), (99, 218139), (129, 167409), (171, 126291), (209, 103329), (267, 80883), (297, 72713), (387, 55803), (473, 45657), (513, 42097), (627, 34443), (801, 26961), (817, 26433), (979, 22059), (1161, 18601), (1419, 15219), (1691, 12771), (1881, 11481), (2403, 8987), (2451, 8811), (2937, 7353), (3827, 5643), (4257, 5073)]