21198555

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{389}}^1$

素因数の和:580

約数の個数: 48

約数和(自身を含む): 42344640

約数和(自身を除く): 21146085

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 173, 315, 389, 519, 865, 1167, 1211, 1557, 1945, 2595, 2723, 3501, 3633, 5835, 6055, 7785, 8169, 10899, 13615, 17505, 18165, 24507, 40845, 54495, 67297, 122535, 201891, 336485, 471079, 605673, 1009455, 1413237, 2355395, 3028365, 4239711, 7066185, 21198555]

約数ペア:

[(1, 21198555), (3, 7066185), (5, 4239711), (7, 3028365), (9, 2355395), (15, 1413237), (21, 1009455), (35, 605673), (45, 471079), (63, 336485), (105, 201891), (173, 122535), (315, 67297), (389, 54495), (519, 40845), (865, 24507), (1167, 18165), (1211, 17505), (1557, 13615), (1945, 10899), (2595, 8169), (2723, 7785), (3501, 6055), (3633, 5835)]