21355785

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{197}}^1$

素因数の和:295

約数の個数: 64

約数和(自身を含む): 42197760

約数和(自身を除く): 20841975

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 73, 99, 135, 165, 197, 219, 297, 365, 495, 591, 657, 803, 985, 1095, 1485, 1773, 1971, 2167, 2409, 2955, 3285, 4015, 5319, 6501, 7227, 8865, 9855, 10835, 12045, 14381, 19503, 21681, 26595, 32505, 36135, 43143, 58509, 71905, 97515, 108405, 129429, 158191, 215715, 292545, 388287, 474573, 647145, 790955, 1423719, 1941435, 2372865, 4271157, 7118595, 21355785]

約数ペア:

[(1, 21355785), (3, 7118595), (5, 4271157), (9, 2372865), (11, 1941435), (15, 1423719), (27, 790955), (33, 647145), (45, 474573), (55, 388287), (73, 292545), (99, 215715), (135, 158191), (165, 129429), (197, 108405), (219, 97515), (297, 71905), (365, 58509), (495, 43143), (591, 36135), (657, 32505), (803, 26595), (985, 21681), (1095, 19503), (1485, 14381), (1773, 12045), (1971, 10835), (2167, 9855), (2409, 8865), (2955, 7227), (3285, 6501), (4015, 5319)]