21517155

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2557}}^1$

素因数の和:2596

約数の個数: 48

約数和(自身を含む): 43097184

約数和(自身を除く): 21580029

約数列:

[1, 3, 5, 9, 11, 15, 17, 33, 45, 51, 55, 85, 99, 153, 165, 187, 255, 495, 561, 765, 935, 1683, 2557, 2805, 7671, 8415, 12785, 23013, 28127, 38355, 43469, 84381, 115065, 130407, 140635, 217345, 253143, 391221, 421905, 478159, 652035, 1265715, 1434477, 1956105, 2390795, 4303431, 7172385, 21517155]

約数ペア:

[(1, 21517155), (3, 7172385), (5, 4303431), (9, 2390795), (11, 1956105), (15, 1434477), (17, 1265715), (33, 652035), (45, 478159), (51, 421905), (55, 391221), (85, 253143), (99, 217345), (153, 140635), (165, 130407), (187, 115065), (255, 84381), (495, 43469), (561, 38355), (765, 28127), (935, 23013), (1683, 12785), (2557, 8415), (2805, 7671)]